Suncor Energy Inc.

Suncor Energy Inc.

June 23, 2008 00:00 ET

Suncor Energy restarts upgrader following oil sands maintenance shutdown

Calgary, Alberta (June 24, 2008) — Suncor Energy Inc. today reported that production at its oil sands operation is expected to ramp up over the next several days as the planned maintenance shutdown of one of its two oil sands upgraders is completed.

Approximately 2,000 contractors were involved in safely completing the maintenance work. Planned shutdowns, which are part of the normal course of operations at the company's oil sands facilities, are scheduled to provide both preventative maintenance and capital replacement to improve operational efficiency.

The shutdown began May 18. Unplanned work, combined with labour shortages, resulted in the maintenance lasting longer than the planned 30 days. 

This news release contains forward-looking statements that address goals, expectations or projections about the future. These statements are based on Suncor's current goals, expectations, estimates, projections and assumptions, as well as its current budgets and plans for capital expenditures. Some of the forward-looking statements may be identified by the words "ramp up", "expected" "scheduled", and similar expressions. These statements are not guarantees of future performance. Actual results could differ materially, as a result of factors, risks and uncertainties, known and unknown, to which Suncor's business is subject. Further discussion of the risks, uncertainties and other factors that could affect these plans, and any actual results, is included in Suncor's annual report to shareholders and other documents filed with regulatory authorities.

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.

- 30 -

Media inquiries:
Brad Bellows
(403) 269-8717

Investor inquiries:
John Rogers
(403) 269-8670