CALGARY, Oct. 5 /PRNewswire-FirstCall/ -- Petro-Canada (TSX: PCA, NYSE: PCZ) - Petro-Canada will host a conference call for analysts and investors on Thursday, October 27, 2005 at 7:00 a.m. Mountain time (9:00 a.m. Eastern time) to discuss third quarter results, which will be released on October 27, 2005. The media will be invited to ask questions following the analysts and investors. If you are unable to join us on October 27, a post audio of the conference call will be available on Petro-Canada's website. Presenters: Ron A. Brenneman, President and CEO Conference Call Host: Gordon Ritchie, Sr. Director - Investor Relations Date: October 27, 2005 Time: 7:00 a.m. Mountain time (9:00 a.m. Eastern time) Telephone: 1-866-540-8136 (N. America); or 416-340-8010 (International) Webcast: http://www.petro-canada.ca/eng/investor/9259.htm Post audio: A post audio will be available one hour after the conclusion of the conference call and will be accessible until January 25, 2006 through 1-800-408-3053 (N. America) and 416-695-5800 (International); reservation No. 3163113. Petro-Canada is one of Canada's largest oil and gas companies, operating in both the upstream and the downstream sectors of the industry in Canada and internationally. Its common shares trade on the TSX under the symbol PCA and on the New York Stock Exchange under the symbol PCZ. DATASOURCE: Petro-Canada CONTACT: Investor and analyst inquiries: Gordon Ritchie, Investor Relations, Petro-Canada, Calgary, Tel: (403) 296-7691; Pamela Tisdale, Investor Relations, Tel: (403) 296-4423; Media & general inquiries: Michelle Harries, Corporate Communications, Petro-Canada, Calgary, Tel: (403) 296-3648; To request a free copy of this organization's annual report, please go to http://www.newswire.ca/ and click on reports@cnw.

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