Tesoro Corporation (NYSE:TSO) announced today that it will release earnings for the second quarter 2010 after the market closes on Wednesday, July 28, 2010. The Company will broadcast, live, its conference call with analysts regarding second quarter 2010 results and other business matters on Thursday, July 29, 2010 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, or via phone by dialing (877) 407-4134 (international dial-in: (201) 689-8430), event ID 00352826. A telephone replay of the call will be available for one week, and may be accessed via phone by dialing (877) 660-6853 (international replay: (201) 612-7415), then entering passcode 352826 and access code 356.

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 over 880 branded retail stations, of which over 380 are company operated under the Tesoro®, Shell®, Mirastar® and USA Gasoline™ brands.

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