Advisory: Petro-Canada Q1 2009 Results


April 16, 2009 -- Petro-Canada (TSX: PCA, NYSE: PCZ) Calgary, Alberta - Petro-Canada will host a conference call for analysts and investors on Tuesday, April 28, 2009 at 7:00 a.m. Mountain time (9:00 a.m. Eastern time) to discuss first quarter results, which will be released on April 28, 2009. The media will be invited to ask questions following the analysts and investors. If you are unable to join us on April 28, a postview of the conference call will be available until July 24, 2009.

Presenters: Ron A. Brenneman, President and CEO; and Harry Roberts, Executive Vice-President and CFO

Conference Call Host: Ken Hall, Sr. Director, Investor Relations

Date: April 28, 2009

Time: 7:00 a.m. Mountain time (9:00 a.m. Eastern time)

Telephone: Analysts & Investors - 1-800-769-8320 (Toll-free North America),
00-800-4222-8835 (Toll-free International) or 416-695-6622
Media - 1-800-952-4972 (Toll-free North America); or 416-695-7848

Audio Webcast: http://www.petro-canada.ca/en/investors/845.aspx

Postview: A postview of the audio webcast will be available one hour after the
conclusion of the conference call and will be accessible until July 24, 2009 by
calling 1-800-408-3053 (North America) or 416-695-5800; pass code:
4003670#

Petro-Canada is one of Canada's largest oil and gas companies, operating in both the upstream and
downstream sectors of the industry in Canada and internationally. The Company creates value by responsibly
developing energy resources and providing world class petroleum products and services. Petro-Canada is
proud to be a National Partner to the Vancouver 2010 Olympic and Paralympic Winter Games. Petro-Canada's
common shares trade on the Toronto Stock Exchange (TSX) under the symbol PCA and on the New York Stock
Exchange (NYSE) under the symbol PCZ.

For more information please contact:
Investor and analyst inquiries:
Ken Hall
Investor Relations
Petro-Canada, Calgary
Tel: (403) 296-7859
e-mail: investor@petro-canada.ca

Media and general inquiries:
Andrea Ranson
Corporate Communications
Petro-Canada, Calgary
Tel: (403) 296-4610
e-mail: corpcomm@petro-canada.ca

Lisa McMahon
Investor Relations
Tel: (403) 296-3764
e-mail: investor@petro-canada.ca
www.petro-canada.ca

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