Suncor Energy Inc.

Suncor Energy Inc.

23 juin 2006 23h59 HE

St. Clair Ethanol Plant Prepared for Start-Up

Sarnia, Ontario (June 23, 2006) — Suncor Energy Products Inc. announced today that the commissioning and start-up phase of the St. Clair Ethanol Plant is ready to begin. Construction on the $120 million facility is nearing completion and the focus will now shift to safely bringing the plant into production.

"We have invested months of planning to ensure a smooth start-up operation," said Andre Boucher, general manager for the St. Clair Ethanol Plant. "Our team is ready to begin the safe production of ethanol."

Community members may notice an increased amount of steam during the commissioning phase, as well as increased truck and rail activity. These are normal conditions of the start-up process, and this activity is expected to decrease once the facility is in full production.

As the largest ethanol production facility in Canada, the St. Clair Ethanol Plant is expected to produce approximately 200 million litres of ethanol annually, while requiring 20 million bushels of corn for its primary feedstock.

Suncor has been blending ethanol into its Sunoco-branded gasoline sold since 1996. As a clean burning, renewable resource, ethanol helps reduce carbon monoxide emissions up to 30 per cent.

Suncor Energy Products Inc. is a wholly-owned subsidiary of Suncor Energy Inc., an integrated energy company. In addition to a refinery in Sarnia, Suncor Energy Products has a network of 281 Sunoco-branded retail and Fleet Fuel cardlock sites and has a 50 per cent joint venture interest in over 200 Pioneer and UPI retail sites. Suncor Energy Products Inc. manufactures, distributes and markets transportation fuels, heating oils and petrochemicals primarily in Ontario. For more information, see the Sunoco website at or

This news release contains a forward-looking statement identified by the words such as "expecting", which is based on Suncor's current expectations, estimates, projections and assumptions made in light of its experiences and the risks, uncertainties and other factors related to its business. Actual events could differ materially as a result of changes to Suncor's plans and the impact of events, risks and uncertainties discussed in Suncor's current annual information form, annual and quarterly reports to shareholders and other documents filed with regulatory authorities.

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Jason Vaillant 
Suncor Energy Products Inc. - Sarnia
(519) 383-3691