CALGARY, ALBERTA -- (Marketwire) -- 07/02/09 -- Suncor Energy Inc. ("Suncor") and Petro-Canada ("Petro-Canada") announce the mailing today to their registered shareholders of the letters of transmittal and election forms and the related instructions for the proposed merger of Suncor Energy Inc. and Petro-Canada.

These documents outline the necessary documentation required to be sent to Computershare Investor Services Inc. (Computershare) by registered Suncor and Petro-Canada shareholders to receive, in relation to the proposed merger of the two companies via a plan of arrangement, the shares of the combined company to which they are entitled in exchange for their Suncor or Petro-Canada common shares (once the conditions to the merger have been satisfied and the merger has closed). Copies of this documentation will be available on the SEDAR website (www.sedar.com), the Securities Exchange Commission's (SEC's) website (www.sec.gov) and the joint merger site at www.suncorpetro-canada.com.

The letters of transmittal and election forms also provide eligible individual registered Suncor and Petro-Canada shareholders, resident in Canada, with the ability to make an election to have the exchange of their Suncor or Petro-Canada shares carried out in such a manner that may allow the shareholder to realize a capital gain or a capital loss for Canadian federal income tax purposes. The deadline for making such an election is 4:30 p.m. (Calgary time) on July 28, 2009.

Suncor and Petro-Canada have obtained the necessary shareholder and Court approvals required to meet certain conditions to the merger, but completion of the proposed merger remains conditional on the satisfaction of all regulatory and other customary conditions. It is expected that the merger will be completed in the third quarter of 2009. In the event that the merger is not completed, any share certificates sent to Computershare will be returned.

For further information on the Suncor and Petro-Canada merger go to www.suncorpetro-canada.com.

Advisory Regarding Forward-Looking Information and Statements

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 "proposed", "may", "expected" and similar expressions are intended to identify forward-looking statements or information.