Calgary, Alberta--(Newsfile Corp. - December 28, 2022) - Suncor Energy (TSX: SU) (NYSE: SU) today provided an update related to its Commerce City refinery.

Due to the extreme and record-setting weather impacting much of the United States, including Denver, Colorado, Suncor's Commerce City refinery experienced equipment damage in the days leading up to December 24^th, 2022. Consistent with our operational excellence and safe operating practice, on December 24^th it was determined that the entire facility would be shut down and put into safe mode to allow for the inspection of all units and repair of the damaged equipment. The inspection and repair of the damaged equipment is ongoing. Based on our current assessment we anticipate a progressive restart of the facility with a return to full operations expected to be completed by late Q1 2023.

Legal Advisory - Forward-Looking Statements

This news release contains certain forward-looking information and forward-looking statements (collectively referred to herein as "forward-looking statements") within the meaning of applicable Canadian and U.S. securities laws. Forward-looking statements in this news release include references to the anticipated progressive restart of the facility and the expected return of the facility to full operations by late Q1 2023.

Forward-looking statements are based on Suncor's current expectations, estimates, projections and assumptions that were made by the company in light of its information available at the time the statement was made and consider Suncor's experience and its perception of historical trends, including expectations and assumptions concerning: the accuracy of reserves and resources estimates; the current and potential adverse impacts of the COVID-19 pandemic, including the status of the pandemic and future waves; commodity prices and interest and foreign exchange rates; the performance of assets and equipment; capital efficiencies and cost-savings; applicable laws and government policies; future production rates; the sufficiency of budgeted capital expenditures in carrying out planned activities; the availability and cost of labour, services and infrastructure; the satisfaction by third parties of their obligations to Suncor; the development and execution of projects; and the receipt, in a timely manner, of regulatory and third-party approvals.

Forward-looking statements are not guarantees of future performance and involve a number of risks and uncertainties, some that are similar to other oil and gas companies and some that are unique to Suncor. Suncor's actual results may differ materially from those expressed or implied by its forward- looking statements, so readers are cautioned not to place undue reliance on them.

The MD&A, together with Suncor's Annual Information Form and Annual Report to Shareholders each dated February 23, 2022, its Form 40-F dated February 24, 2022, and other documents it files from time to time with securities regulatory authorities describe the risks, uncertainties, material assumptions and other factors that could influence actual results and such factors are incorporated herein by reference. Copies of these documents are available without charge from Suncor at 150 6th Avenue S.W., Calgary, Alberta T2P 3E3; by e-mail request to invest@suncor.com; by calling (800) 558-9071; or by referring to suncor.com/FinancialReports or to the company's profile on SEDAR at sedar.com or EDGAR at sec.gov. Except as required by applicable securities laws, Suncor disclaims any intention or obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Suncor is Canada's leading integrated energy company. Suncor's operations include oil sands development, production and upgrading, offshore oil and gas production, petroleum refining in Canada and the United States and the company's Petro-Canada retail and wholesale distribution networks, including Canada's Electric Highway, a coast-to-coast network of fast-charging EV stations. Suncor is developing petroleum resources while advancing the transition to a low-emissions future through investment in power, renewable fuels and hydrogen. Suncor also conducts energy trading activities focused principally on the marketing and trading of crude oil, natural gas, byproducts, refined products and power. Suncor has been recognized for its performance and transparent reporting on the Dow Jones Sustainability index, FTSE4Good and CDP. Suncor's common shares (symbol: SU) are listed on the Toronto and New York stock exchanges.

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For more information about Suncor, visit our web site at suncor.com or follow us on Twitter @Suncor

Media inquiries:
(833) 296-4570
media@suncor.com

Investor inquiries:
(800) 558-9071
invest@suncor.com

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