SAN ANTONIO - October 4, 2011 - Tesoro Corporation (NYSE:TSO) announced today that it plans to release its earnings for the third quarter 2011 after the market closes on Wednesday, November 2, 2011.  The Company will broadcast, live, its conference call with analysts regarding third quarter results and other business matters on Thursday, November 3, 2011 at 7:30 a.m. CDT.  Interested parties may listen to the live conference call over the Internet by logging on to http://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 665,000 barrels per day.  Tesoro's retail-marketing system includes nearly 1,200 branded retail stations, of which over 375 are company operated under the Tesoro®, Shell® and USA Gasoline^TM brands.

Contact:
Investors:  Louie Rubiola, Director, Investor Relations, (210) 626-4355
Media:  Mike Marcy, Manager of External Affairs, (210) 626-4697