2008-10-01 23:55:03 -

www.tsocorp.com - Tesoro Corporation (NYSE:TSO) announced today that it will release earnings for the third quarter of 2008 on Wednesday evening, October 29, 2008. The Company will broadcast, live, its conference call with analysts regarding third quarter 2008 results and other business matters on Thursday, October 30, 2008 at 7:30 a.m. CDT. Interested parties may listen to the live conference call over the Internet by logging on to Tesoro's Internet site at www.tsocorp.com.

Tesoro Corporation, a Fortune 150 Company, is an independent refiner and marketer of petroleum products. Tesoro, through its subsidiaries, operates seven refineries in the western United States with a combined capacity of approximately 660,000 barrels per day. Tesoro's retail-marketing system includes over 900 branded retail

stations, of which nearly 445 are company operated under the Tesoro(R), Shell(R), Mirastar(R) and USA Gasoline(TM) brands.

Tesoro Corporation, San Antonio
Investors:
Scott Phipps, 210-283-2882
Director, Investor Relations
or
Media:
Sarah Simpson, 210-283-2374
Vice President, Corporate Communications