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<SEC-DOCUMENT>0001104659-10-032437.txt : 20100604
<SEC-HEADER>0001104659-10-032437.hdr.sgml : 20100604
<ACCEPTANCE-DATETIME>20100604143536
ACCESSION NUMBER:		0001104659-10-032437
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20100603
FILED AS OF DATE:		20100604
DATE AS OF CHANGE:		20100604

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:		10878621

	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>a10-11544_16k.htm
<DESCRIPTION>6-K
<TEXT>

<html>

<head>





</head>

<body lang="EN-US">

<div style="font-family:Times New Roman;">

<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;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&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;">FORM&nbsp;6-K</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="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. 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<br>
Pursuant to Rule&nbsp;13a - 16 or 15d - 16 of<br>
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="43%" valign="top" style="padding:0in 0in 0in 0in;width:43.28%;">
  <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: June&nbsp;2010</font></b></p>
  </td>
  <td width="56%" valign="bottom" style="padding:0in 0in 0in 0in;width:56.72%;">
  <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 style="margin:0in 0in .0001pt;"><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.<br>
</font></b><font size="2" 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.<br>
P.O.&nbsp;Box 38<br>
Calgary, Alberta<br>
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="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.34%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="14%" valign="top" style="padding:0in 0in 0in 0in;width:14.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Form&nbsp;20-F</font></p>
  </td>
  <td width="20%" valign="bottom" style="padding:0in 0in 0in 0in;width:20.38%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
  </td>
  <td width="14%" valign="bottom" style="padding:0in 0in 0in 0in;width:14.88%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="top" style="padding:0in 0in 0in 0in;width:17.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Form&nbsp;40-F</font></p>
  </td>
  <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.84%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font></p>
  </td>
  <td width="19%" valign="top" style="padding:0in 0in 0in 0in;width:19.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt .5in;"><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="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.34%;">
  <p align="right" style="margin:0in 0in .0001pt;text-align:right;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="14%" valign="top" style="padding:0in 0in 0in 0in;width:14.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Yes</font></p>
  </td>
  <td width="20%" valign="bottom" style="padding:0in 0in 0in 0in;width:20.38%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
  </td>
  <td width="14%" valign="bottom" style="padding:0in 0in 0in 0in;width:14.88%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="top" style="padding:0in 0in 0in 0in;width:17.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">No</font></p>
  </td>
  <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.84%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font></p>
  </td>
  <td width="19%" valign="top" style="padding:0in 0in 0in 0in;width:19.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><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>

<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="7%" valign="top" style="padding:0in 0in 0in 0in;width:7.34%;">
  <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:19.58%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">N/A</font></p>
  </td>
  <td width="14%" valign="bottom" style="padding:0in 0in 0in 0in;width:14.88%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="14%" valign="bottom" style="padding:0in 0in 0in 0in;width:14.88%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="17%" valign="top" style="padding:0in 0in 0in 0in;width:17.32%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.84%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><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:19.16%;">
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
 </tr>
</table>

<p style="margin:0in 0in .0001pt .5in;"><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 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;">&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:50.0%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <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:50.0%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <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:50.0%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <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:50.0%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date:</font></p>
  </td>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <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:50.0%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <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="47%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:47.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">June&nbsp;3, 2010</font></p>
  </td>
  <td width="2%" valign="top" style="padding:0in 0in 0in 0in;width:2.92%;">
  <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:4.16%;">
  <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:45.84%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;Shawn Poirier&#148;</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <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:4.16%;">
  <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:45.84%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Shawn Poirier</font></p>
  </td>
 </tr>
 <tr>
  <td width="50%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
  <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:4.16%;">
  <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:45.84%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Assistant Corporate Secretary</font></p>
  </td>
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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;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2<a name="PB_2_215823_2897"></a></font></p>

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

</div>
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<p style="margin:0in 0in .0001pt 1.3in;"><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 style="margin:0in 0in .0001pt 1.3in;"><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="9%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:9.44%;">
  <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:2.38%;">
  <p style="margin:0in 0in .0001pt;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
  </td>
  <td width="88%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:88.18%;">
  <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="9%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:9.44%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.38%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  </td>
  <td width="88%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:88.18%;">
  <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="9%" valign="top" style="padding:0in 0in 0in 0in;width:9.44%;">
  <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>
  <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.38%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
  </td>
  <td width="88%" valign="top" style="padding:0in 0in 0in 0in;width:88.18%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press
  Release Dated June&nbsp;3, 2010, Suncor Energy reports oil sands production
  numbers for May&nbsp;2010</font></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;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3<a name="PB_3_215904_3020"></a></font></p>

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

</div>
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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>a10-11544_1ex99d1.htm
<DESCRIPTION>EX-99.1 PRESS RELEASE DATED JUNE 3, 2010
<TEXT>

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</head>

<body lang="EN-US">

<div style="font-family:Times New Roman;">

<p align="right" style="margin:0in 0in .0001pt 1.7in;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;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</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;">Press Release Dated June&nbsp;3, 2010,</font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;"><br>
</font></b><b><font size="2" style="font-size:10.0pt;font-weight:bold;">Suncor Energy reports oil sands production numbers for May&nbsp;2010</font></b></p>

<p style="margin:0in 0in .0001pt;"><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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<br clear="all" style="page-break-before:always;">


<div style="font-family:Times New Roman;">

<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="59%" valign="top" style="padding:0in 0in 0in 0in;width:59.78%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman"><img width="148" height="77" src="g115441mmi001.jpg"></font></p>
  </td>
  <td width="40%" valign="bottom" style="padding:0in 0in 0in 0in;width:40.22%;">
  <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;">News Release</font></b></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;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">FOR IMMEDIATE RELEASE</font></b></p>

<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;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Suncor Energy reports oil sands
production numbers for May&nbsp;2010</font></b></p>

<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;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Calgary, Alberta (June&nbsp;3, 2010)</font></b><font size="2" style="font-size:10.0pt;"> &#151; Suncor Energy Inc. reported today that the company&#146;s oil sands
production during May&nbsp;averaged approximately 304,000 barrels per day
(bpd). Planned maintenance on one of the company&#146;s two upgraders began on May&nbsp;17
and is proceeding as planned. Year-to-date oil sands production at the end of May&nbsp;averaged
approximately 250,000 bpd. Suncor is targeting average oil sands production of
280,000 bpd (+/- 5%) in 2010.</font></p>

<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;">Production numbers include upgraded sweet and sour
synthetic crude oil and diesel, as well as non-upgraded bitumen sold directly
to the market, from all Suncor-operated facilities. Reported volumes do not
include Suncor&#146;s proportionate production share from the Syncrude joint
venture.</font></p>

<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;">On a monthly basis, Suncor reports production numbers from
its oil sands operation in order to provide stakeholders with a more timely
review of operational performance. These numbers are preliminary and subject to
adjustment. Monthly totals may differ from the year-to-date total due to
rounding, the impact of sales and changes in inventory. Production volumes will
be confirmed when Suncor&#146;s second quarter results are released.</font></p>

<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;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">This news release contains forward-looking statements,
including a maintenance schedule and an outlook production range of 280,000
(+/- 5%) bpd which are based on Suncor&#146;s current expectations, estimates,
projections and assumptions. Uncertainties in the estimate process and impact
of future events may cause actual results to differ, in some cases materially,
from our estimates. Assumptions are based on management&#146;s experience and
perception of historical trends, current business and operating conditions,
anticipated future developments and other factors believed to be relevant to
Suncor&#146;s business. Assumptions for the Oil Sands 2010 full year outlook include
implementing reliability and operational efficiency initiatives which we expect
to minimize further unplanned maintenance in 2010. Some of the forward-looking
statements may be identified by words such as &#147;planned&#148;, &#147;expected&#148;,
&#147;scheduled&#148;, &#147;targeted&#148; and similar expressions. Readers are cautioned that
actual results could differ materially from those expressed or implied by these
forward-looking statements as a result of changes to Suncor&#146;s plans and the
impact of events, risks and uncertainties discussed in Suncor&#146;s first quarter
earnings release, current annual information form/form 40-F, current annual
report to shareholders and other documents filed with Canadian securities
commissions at www.sedar.com and the United States Securities and Exchange
Commission (SEC) at www.sec.gov. Readers are cautioned not to place undue
reliance on such forward-looking statements.</font></i></p>

<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;"><i><font size="2" face="Times New Roman" style="font-size:10.0pt;font-style:italic;">Suncor Energy Inc. is Canada&#146;s premier integrated energy
company. Suncor&#146;s operations include oil sands development and upgrading, conventional
and offshore oil and gas production, petroleum refining, and product marketing
under the Petro-Canada brand. While working to responsibly develop petroleum
resources, Suncor is also developing a growing renewable energy portfolio.
Suncor&#146;s common shares (symbol: SU) are listed on the Toronto and New York
stock exchanges.</font></i></p>

<p style="margin:0in 0in .0001pt;"><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;">- 30 -</font></p>

<p style="margin:0in 0in .0001pt 3.35in;"><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;">For more information about Suncor Energy Inc. please visit
our web site at www.suncor.com.</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="17%" valign="top" style="padding:0in 0in 0in 0in;width:17.92%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Investor inquiries:</font></p>
  </td>
  <td width="82%" valign="top" style="padding:0in 0in 0in 0in;width:82.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Helen Kelly 403-693-2048 </font></p>
  </td>
 </tr>
 <tr>
  <td width="17%" valign="top" style="padding:0in 0in 0in 0in;width:17.92%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Media inquiries:</font></p>
  </td>
  <td width="82%" valign="top" style="padding:0in 0in 0in 0in;width:82.08%;">
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">403-920-8332</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 3.8in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Suncor Energy Inc.</font></p>

<p style="margin:0in 0in .0001pt 3.8in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">P.O.&nbsp;Box 38, 112 4 Avenue S.W., Calgary, Alberta T2P 2V5<br>
Website: www.suncor.com</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>

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

</div>
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