Suncor Energy Inc.
TSX : SU
NYSE : SU

Suncor Energy Inc.

02 oct. 2007 23h59 HE

Planned maintenance activities underway at Suncor Energy's Commerce City refinery

Denver, Colorado (October 2, 2007) — Suncor Energy (U.S.A.) Inc. announced today that it has begun a planned maintenance shutdown at a portion of its Commerce City refinery. The maintenance work is designed to maintain operational and environmental performance of its assets.

The refinery's East Plant crude unit and other associated processing units are expected to shut down and start up in a staggered sequence. Work is also scheduled for infrastructure, including electrical, utilities and the flare system. The maintenance outage is expected to last approximately one month. During the shutdown, the refinery is expected to continue to operate at approximately 65% of capacity.

"We have a solid plan," said Bill Buckalew, Suncor's general manager. "The true measure of our success for the planned maintenance will be our ability to complete it safely and without impact to our neighbors, customers or the environment."

Although the maintenance shutdown may result in an increase in traffic in and around Suncor's operations, necessary precautions have been taken to keep these disruptions to a minimum.

Suncor has made arrangements to procure additional supplies of products and expects to honor all customer supply agreements during the shutdown period.

Government regulators with the State of Colorado have been informed of the maintenance shutdown.

This news release contains forward-looking statements. The forward-looking statements may be identified by words like "expected," "designed," "planned," "scheduled" and similar expressions. These forward-looking statements are based on current conditions and assumptions and are not a guarantee of future events. Actual events could differ materially as a result of changes to Suncor's plans and the impact of certain events, risks and uncertainties.

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.

For more information, contact: 
Lisha Burnett
303-570-2540