Suncor Energy Inc.

Suncor Energy Inc.

March 10, 2005 00:00 ET

Suncor Energy files annual disclosure documents

Calgary, Alberta (March 10, 2005) — Suncor Energy Inc. reports that it has filed its 2005 annual disclosure documents with Canadian securities commissions and the United States Securities and Exchange Commission.

Suncor's 2005 Annual Report contains the company's audited consolidated financial statements and notes for the year ended December 31, 2005, and related management's discussion and analysis. The 2005 Annual Information Form contains information on Suncor's oil and gas activities, including crude oil and natural gas reserves data, the report of external qualified reserves evaluators, and related report of company management and directors. Suncor also filed with securities commissions its 2006 Management Proxy Circular, providing governance and voting information for shareholders.

To view the company's annual disclosure documents, visit www.suncor.com/financialreports or see Suncor's profile on www.sedar.com. To order print copies of Suncor's materials, call 1-800-558-9071.

Suncor Energy Inc. is an integrated energy company headquartered in Calgary, Alberta. Suncor'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 operates a refining and marketing business in Ontario with retail distribution under the Sunoco brand. U.S.A. downstream assets include pipeline and refining operations in Colorado and Wyoming and retail sales in the Denver area under the Phillips 66 brand. Suncor's common shares (symbol: SU) are listed on the Toronto and New York stock exchanges.

Suncor Energy (U.S.A.) Inc. is an authorized licensee of the Phillips 66® 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, Inc. of Philadelphia.

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John Rogers 403-269-8670