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<SEC-DOCUMENT>0001104659-09-045985.txt : 20090730
<SEC-HEADER>0001104659-09-045985.hdr.sgml : 20090730
<ACCEPTANCE-DATETIME>20090730160626
ACCESSION NUMBER:		0001104659-09-045985
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20090728
FILED AS OF DATE:		20090730
DATE AS OF CHANGE:		20090730

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUNCOR ENERGY INC
		CENTRAL INDEX KEY:			0000311337
		STANDARD INDUSTRIAL CLASSIFICATION:	PETROLEUM REFINING [2911]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			A0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12384
		FILM NUMBER:		09973843

	BUSINESS ADDRESS:	
		STREET 1:		112 4TH AVENUE SW PO BOX 38
		STREET 2:		CALGARY
		CITY:			ALBERTA CANADA
		STATE:			A0
		ZIP:			T2P 2V5
		BUSINESS PHONE:		4032698100

	MAIL ADDRESS:	
		STREET 1:		112 FOURTH AVE SW BOX 38
		STREET 2:		CALGARY
		CITY:			ALBERTA CANADA
		ZIP:			T2P 2V5

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SUNCOR INC
		DATE OF NAME CHANGE:	19970430

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GREAT CANADIAN OIL SANDS & SUN OIL CO LTD
		DATE OF NAME CHANGE:	19791129
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>a09-20082_16k.htm
<DESCRIPTION>6-K
<TEXT>

<html>

<head>





</head>

<body lang="EN-US">

<div>

<div style="border-bottom:solid windowtext 1.0pt;border-left:none;border-right:none;border-top:solid windowtext 3.0pt;padding:1.0pt 0in 1.0pt 0in;">

<p style="border:none;margin:0in 0in .0001pt;padding:0in;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>

</div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="font-weight:bold;margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;">FORM&nbsp;6-K</font></b></p>

<p style="font-weight:bold;margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES
AND EXCHANGE COMMISSION</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">WASHINGTON,
D.C.&#160;&#160; 20549</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Report of Foreign Private Issuer</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant to Rule&nbsp;13a - 16 or 15d - 16 of</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">the Securities Exchange Act of 1934</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.34%;">
  <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">For the month of:
  July&nbsp;2009</font></b></p>
  </td>
  <td width="3%" valign="bottom" style="padding:0in 0in 0in 0in;width:3.82%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="46%" valign="top" style="padding:0in 0in 0in 0in;width:46.84%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Commission
  File Number: 1-12384</font></b></p>
  </td>
 </tr>
</table>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SUNCOR ENERGY
INC.</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Name of
registrant)</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">112
Fourth Avenue S.W.</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">P.O.&nbsp;Box
38</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Calgary,
Alberta</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Canada,
T2P 2V5</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Indicate by check mark
whether the registrant files or will file annual reports under cover of Form&nbsp;20-F
or Form&nbsp;40-F:</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="35%" valign="bottom" style="padding:0in 0in 0in 0in;width:35.74%;">
  <p style="margin:0in 0in .0001pt 1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Form&nbsp;20-F&nbsp;</font><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
  </td>
  <td width="7%" valign="bottom" style="padding:0in 0in 0in 0in;width:7.28%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="19%" valign="top" style="padding:0in 0in 0in 0in;width:19.9%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="37%" valign="bottom" style="padding:0in 0in 0in 0in;width:37.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Form&nbsp;40-F&nbsp;</font><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font></p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Indicate by check mark
whether the registrant by furnishing the information contained in this Form&nbsp;is
also thereby furnishing the information to the SEC pursuant to Rule&nbsp;12g3-2(b)&nbsp;under
the Securities Exchange Act of 1934:</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="35%" valign="bottom" style="padding:0in 0in 0in 0in;width:35.74%;">
  <p style="margin:0in 0in .0001pt 1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Yes&nbsp;</font><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
  </td>
  <td width="7%" valign="bottom" style="padding:0in 0in 0in 0in;width:7.28%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="19%" valign="top" style="padding:0in 0in 0in 0in;width:19.9%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="37%" valign="bottom" style="padding:0in 0in 0in 0in;width:37.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">No&nbsp;</font><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font></p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">If &#147;Yes&#148; is marked, indicate
the number assigned to the registrant in connection with Rule&nbsp;12g3-2(b):</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="35%" valign="top" style="padding:0in 0in 0in 0in;width:35.74%;">
  <p style="margin:0in 0in .0001pt 1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">N/A</font></p>
  </td>
  <td width="7%" valign="bottom" style="padding:0in 0in 0in 0in;width:7.28%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="19%" valign="top" style="padding:0in 0in 0in 0in;width:19.9%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="37%" valign="bottom" style="padding:0in 0in 0in 0in;width:37.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div style="border-bottom:solid windowtext 3.0pt;border-left:none;border-right:none;border-top:solid windowtext 1.0pt;padding:1.0pt 0in 1.0pt 0in;">

<p style="border:none;margin:0in 0in .0001pt;padding:0in;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>

</div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>

</div>
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<div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the
requirements of the Securities Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned, thereunto
duly authorized.</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
  <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SUNCOR ENERGY INC.</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
  <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date:</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
  </td>
  <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="44%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:44.84%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">July&nbsp;28, 2009</font></p>
  </td>
  <td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.42%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="45%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;Arlene Strom&#148;</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="45%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">ARLENE J. STROM</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="45%" valign="top" style="padding:0in 0in 0in 0in;width:45.42%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Assistant Corporate
  Secretary</font></p>
  </td>
 </tr>
 <tr height="0">
  <td width="335" style="border:none;"></td>
  <td width="41" style="border:none;"></td>
  <td width="32" style="border:none;"></td>
  <td width="340" style="border:none;"></td>
 </tr>
</table>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>

<div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>

</div>
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<div>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT
INDEX</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>

<table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
 <tr>
  <td width="7%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:7.76%;">
  <p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit</font></b></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.82%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="89%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:89.42%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description of Exhibit</font></b></p>
  </td>
 </tr>
 <tr>
  <td width="7%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:7.76%;">
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  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
  </td>
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  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
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  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Material Change Report,
  dated July&nbsp;28, 2009</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3</font></p>

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<TYPE>EX-99.1
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<DESCRIPTION>MATERIAL CHANGE REPORT, DATED JULY 28, 2009
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<p align="right" style="margin:0in 0in .0001pt;text-align:right;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT
99.1</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Material Change Report dated
July&nbsp;28, 2009.</font></b></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">FORM&nbsp;51-102F3</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">MATERIAL
CHANGE REPORT</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">1.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Name and Address of Company:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Suncor Energy Inc. (&#147;Suncor&#148;)</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Drawer 38, 112 4</font><font size="1" style="font-size:6.5pt;position:relative;top:-3.0pt;">th</font><font size="2" style="font-size:10.0pt;">&#160;Ave. S.W.</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Calgary, Alberta</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">T2P 2V4</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">2.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Date of Material Change:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">July&nbsp;21, 2009</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">3.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Press Release:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The press release was disseminated through the
facilities of a recognized news service and would have been received by the
securities commissions in the jurisdictions in which Suncor is a reporting
issuer and by the stock exchanges on which Suncor&#146;s securities are listed and
posted for trading, in the normal course of such dissemination.</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">4.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Summary of Material Change:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">A press release dated July&nbsp;21, 2009 (released
between close of markets on July&nbsp;21, 2009 and opening of markets on July&nbsp;22,
2009) was issued reporting that the Competition Bureau has approved the
proposed merger of Suncor and Petro-Canada. The approval is reflected in a
consent agreement with the Competition Bureau which will be registered with the
Competition Tribunal in Ottawa.</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In addition, it was announced that with all the
conditions necessary to complete the merger satisfied, Suncor and Petro-Canada
intend to make the merger effective August&nbsp;1, 2009.</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">5.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Full Description of Material Change:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">See press release attached as Appendix A.</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">6.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Reliance on Subsection 7.1(2)&nbsp;or (3)&nbsp;of
National Instrument 51-102.</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Not applicable</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">7.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Omitted Information:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">No information has been omitted.</font></p>

<p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">8.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Executive Officer:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">J. Kenneth Alley, Chief Financial Officer
of Suncor, may be reached at 403-269-8100.</font></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">9.</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" style="font-size:10.0pt;">Date of Report:</font></p>

<p align="left" style="font-weight:bold;margin:0in 0in .0001pt .5in;text-align:left;text-indent:-.5in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></b></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">July&nbsp;28, 2009, at the City of Calgary, Alberta.</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="margin:0in 0in .0001pt .5in;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<table border="0" cellspacing="0" cellpadding="0" width="93%" style="border-collapse:collapse;margin-left:.5in;width:93.34%;">
 <tr>
  <td width="50%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;TERRENCE
  J. HOPWOOD&#148;</font></p>
  </td>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
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  <td width="50%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Terrence J.
  Hopwood</font></p>
  </td>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Senior Vice
  President and General Counsel</font></p>
  </td>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
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  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Suncor Energy Inc.</font></p>
  </td>
  <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p align="left" style="margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
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<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">APPENDIX
A</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">TO</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">MATERIAL
CHANGE REPORT</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">OF</font></b></p>

<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SUNCOR
ENERGY INC. DATED JULY 28, 2009</font></b></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Suncor Energy and
Petro-Canada Merger Receives Competition Bureau Approval</font></b></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Calgary, Alberta (July&nbsp;21, 2009)</font></b><font size="2" style="font-size:10.0pt;"> - Suncor Energy Inc. (TSX:SU)
(NYSE:SU) and Petro-Canada (TSX:PCA) (NYSE:PCZ) announced today that the
Competition Bureau has approved the proposed merger of Suncor and Petro-Canada.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The approval is reflected in a consent agreement with
the Competition Bureau which will be registered with the Competition Tribunal
in Ottawa. Under the consent agreement the companies have agreed to take steps
to maintain retail and wholesale competition in Ontario, including divesting
104 retail locations, and entering into certain supply and throughput
arrangements in Ontario for a period of 10 years.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">With all the conditions necessary to complete the
merger satisfied, Suncor and Petro-Canada intend to make the merger effective August&nbsp;1,
2009.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;The Bureau&#146;s review process was very intensive and
thorough,&#148; said Rick George, who is currently president and chief executive
officer of Suncor and will assume the same role in the merged company. &#147;We are
satisfied that the resulting terms will preserve the expected benefits of the
merger and maintain a competitive refined products market in Ontario.&#148;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;With this major milestone behind us, our focus now is
to get the final pieces in place to close the deal and launch what will be
Canada&#146;s premier energy company,&#148; said George.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">For further information on the Suncor and Petro-Canada
merger go to www.suncorpetro-canada.com.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Advisory Regarding Forward-Looking
Information and Statements</font></b></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This press release contains forward-looking statements
and forward-looking information within the meaning of applicable securities
laws. The use of any of the words &#147;anticipate&#148;, &#147;believe&#148;, &#147;expected&#148;, &#147;will&#148;,
and similar expressions are intended to identify forward-looking statements or
information. More particularly, and without limitation, this press release
contains forward-looking statements and information concerning the completion
of the proposed merger; the ability of the parties to realize the anticipated
benefits and synergies of the merger; and the expected completion date of the
proposed merger.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Since forward-looking statements and information
address future events and conditions, by their very nature they involve
inherent risks and uncertainties. Actual results could differ materially from
those currently anticipated due to a number of factors and risks. These
include, but are not limited to, the risks inherent in the nature of the
merger, including: the failure to realize the anticipated benefits of the
merger and to successfully integrate Suncor and Petro-Canada; the ability of
the merged entity to access sufficient capital from internal and external
sources on favourable terms, or at all; changes in legislation, including but
not limited to tax laws, royalty rates and environmental regulations; failure
to realize anticipated synergies or cost savings; and incorrect assessments by
one party to the merger of the value of the other party to the merger.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Suncor and Petro-Canada have provided the anticipated
time of completion of the merger in reliance on certain assumptions that they
believe are reasonable at this time, including assumptions as to the time
necessary to satisfy the conditions to the closing of the transaction. These
dates may change for a number of reasons, including due to the need for
additional time to satisfy the conditions to the completion of the transaction.
As a result of the foregoing, readers should not place undue reliance on the forward-looking
statements and information contained in this press release concerning these
times.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Readers are cautioned that the foregoing list of
factors is not exhaustive. Additional information on these and other factors
that could affect the completion of the merger and its anticipated benefits and
value are included in the joint information circular and proxy statement of
Suncor and Petro-Canada dated April&nbsp;29, 2009, which has been filed with
the applicable securities regulatory authorities and may be accessed through
the SEDAR website (www.sedar.com), the SEC&#146;s website (www.sec.gov) or through
the joint merger site at www.suncorpetro-canada.com.</font></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The forward-looking statements and information
contained in this press release are made as of the date hereof and Suncor and
Petro-Canada undertake no obligation to update publicly or revise any
forward-looking statements or information, whether as a result of new
information, future events or otherwise, unless so required by applicable
securities laws.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ABOUT SUNCOR</font></b></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Suncor Energy Inc. is an integrated energy company
headquartered in Calgary, Alberta. Suncor&#146;s oil sands business, located near
Fort McMurray, Alberta, extracts and upgrades oil sands and markets refinery
feedstock and diesel fuel, while operations throughout western Canada produce
natural gas. Suncor also operates a refining and marketing business which
includes refining, retail, pipeline and distribution operations in Ontario,
Canada and in Colorado and Wyoming in the United States. Suncor&#146;s common shares
(symbol: SU) are listed on the Toronto and New York stock exchanges.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Suncor Energy (U.S.A.) Inc. is an authorized licensee
of the Shell(R)&nbsp;and Phillips 66(R)&nbsp;brand and marks in the state of
Colorado. Sunoco in Canada is separate and unrelated to Sunoco in the United
States, which is owned by Sunoco,&nbsp;Inc. of Philadelphia.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">For further information about Suncor, please visit
www.suncor.com.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ABOUT PETRO-CANADA</font></b></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Petro-Canada is one of Canada&#146;s largest oil and gas
companies, operating in both the upstream and the downstream sectors of the
industry in Canada and internationally. The Company creates value by
responsibly developing energy resources and providing world class petroleum
products and services. Petro-Canada is proud to be a National Partner to the
Vancouver 2010 Olympic and Paralympic Winter Games. Petro-Canada&#146;s common
shares trade on the Toronto Stock Exchange under the symbol PCA and on the New
York Stock Exchange under the symbol PCZ.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">For further information about Petro-Canada, please visit
www.petro-canada.ca.</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">-30-</font></p>

<p align="center" style="background:white;margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">For more information please contact:</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Investor inquiries:</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">John Rogers, Suncor</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(403) 269-8670</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">or</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Media inquiries:</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Brad Bellows, Suncor</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(403) 269-8717</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Website: www.suncor.com</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">or</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Investor inquiries:</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Ken Hall, Petro-Canada</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(403) 296-7859</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">or</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Media inquiries:</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Jon Hamilton, Petro-Canada</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(905) 804-5911</font></p>

<p align="left" style="background:white;margin:0in 0in .0001pt;text-align:left;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Website: www.petro-canada.ca</font></p>

<p style="margin:0in 0in .0001pt;text-align:justify;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>

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