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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001047469-08-007168.txt : 20080603
<SEC-HEADER>0001047469-08-007168.hdr.sgml : 20080603
<ACCEPTANCE-DATETIME>20080603172333
ACCESSION NUMBER:		0001047469-08-007168
CONFORMED SUBMISSION TYPE:	FWP
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20080603
DATE AS OF CHANGE:		20080603

SUBJECT COMPANY:	

	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:		FWP
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	333-151347
		FILM NUMBER:		08878396

	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

FILED BY:		

	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:		FWP

	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>FWP
<SEQUENCE>1
<FILENAME>a2186148zfwp.htm
<DESCRIPTION>FWP
<TEXT>
<HTML>
<HEAD>
</HEAD>
<BODY BGCOLOR="#FFFFFF" LINK=BLUE  VLINK=PURPLE>
<BR>
<FONT SIZE=3 ><A HREF="#08ZBH16511_1">QuickLinks</A></FONT>
<font size=3> -- Click here to rapidly navigate through this document</font>
<P ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2>


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 </FONT></P>

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<P ALIGN="RIGHT" style="font-family:times;"><FONT SIZE=2><A
NAME="ba16511_filed_pursuant_to_rule_433_reg__fil01642"> </A>
<A NAME="toc_ba16511_1"> </A>
<BR></FONT><FONT SIZE=2><B>Filed Pursuant to Rule&nbsp;433<BR>  Registration No.&nbsp;333-151347<BR>  June&nbsp;3, 2008    <BR>    </B></FONT></P>

<P ALIGN="CENTER" style="font-family:times;"><FONT SIZE=2><A
NAME="ba16511_final_term_sheet"> </A>
<A NAME="toc_ba16511_2"> </A>
<BR></FONT><FONT SIZE=2><B>Final Term Sheet    <BR>    </B></FONT></P>

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<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B>Issuer:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
Suncor Energy&nbsp;Inc.</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Size:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
U.S.$1,250,000,000</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Maturity:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
June&nbsp;1, 2018</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Coupon:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
6.100%</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Price:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
99.883% of face amount</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Yield to maturity:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
6.116%</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD COLSPAN=2 VALIGN="TOP" style="font-family:times;"><BR><FONT SIZE=2><B> Spread to Benchmark Treasury:</B></FONT></TD>
<TD WIDTH="2%" VALIGN="TOP" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" VALIGN="TOP" style="font-family:times;"><FONT SIZE=2><BR>
2.230%</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Benchmark Treasury:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
3.875% due May&nbsp;15, 2018</FONT></TD>
</TR>
<TR VALIGN="BOTTOM">
<TD COLSPAN=2 VALIGN="TOP" style="font-family:times;"><BR><FONT SIZE=2><B> Benchmark Treasury Price and Yield:</B></FONT></TD>
<TD WIDTH="2%" VALIGN="TOP" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" VALIGN="TOP" style="font-family:times;"><FONT SIZE=2><BR>
99-29 / 3.886%</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Interest Payment Dates:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
June&nbsp;1 and December&nbsp;1, commencing December&nbsp;1, 2008</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Redemption Provisions:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
Make-whole</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=0>&nbsp;</FONT></TD>
<TD WIDTH="30%" style="font-family:times;"><BR><FONT SIZE=2><B> Make-whole call</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
At any time at a discount rate of Treasury plus 35&nbsp;basis points</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Settlement:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
T+3; June&nbsp;6, 2008</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> CUSIP:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
86722T AA0</FONT></TD>
</TR>
<TR VALIGN="TOP">
<TD COLSPAN=2 style="font-family:times;"><BR><FONT SIZE=2><B> Expected Ratings:</B></FONT></TD>
<TD WIDTH="2%" style="font-family:times;"><FONT SIZE=2><B><BR>&nbsp;</B></FONT></TD>
<TD WIDTH="66%" style="font-family:times;"><FONT SIZE=2><BR>
Moody's: A3 (stable outlook)<BR>
S&amp;P: A- (negative outlook)</FONT></TD>
</TR>
</TABLE>
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<P style="font-family:times;"><FONT SIZE=2>The
Company's cash and cash equivalents as at December&nbsp;31, 2007 were $569&nbsp;million. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2>Note:
A securities rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any&nbsp;time. </FONT></P>

<P style="font-family:times;"><FONT SIZE=2><B>The issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the
prospectus in that registration statement and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering. You may get these documents for free
by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it
by calling Banc of America Securities&nbsp;LLC at 1-800-294-1322, Morgan Stanley&nbsp;&amp;&nbsp;Co. Incorporated at
1-866-718-1649, BNP&nbsp;Paribas Securities Corp. at 1-800-854-5674 or RBC&nbsp;Capital Markets Corporation at
1-866-375-6829.</B></FONT></P>

<HR NOSHADE>
<P style='font-family:times;page-break-before:always'></p>
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<P><br><A NAME="08ZBH16511_1">QuickLinks</A><br></P><!-- TOC_BEGIN -->
<UL>
<FONT SIZE=2 style="font-family:times;"><A HREF="#toc_ba16511_1">Filed Pursuant to Rule 433 Registration No. 333-151347 June 3, 2008</A></FONT><BR>
</UL>
<FONT SIZE=2 style="font-family:times;"><A HREF="#toc_ba16511_2">Final Term Sheet</A></FONT><BR>

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