Public Invited to Listen to Analyst Conference Call via Internet SAN ANTONIO, Texas, July 9 /PRNewswire-FirstCall/ -- At 9:30 am, CDT, Tuesday, August 7, 2007, Tesoro will broadcast, live, its conference call with analysts regarding first quarter 2007 results. Interested parties may listen to the live conference call over the Internet by logging on to Tesoro's Internet site at http://www.tsocorp.com/. A replay will be available for ten days. To access the recording call (800) 642-1687, conference ID #6810358 Tesoro Corporation, a Fortune 150 Company, is an independent refiner and marketer of petroleum products. Tesoro 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 880 retail outlets, of which 464 are company owned locations. DATASOURCE: Tesoro Corporation CONTACT: Scott Phipps for Tesoro Corporation, +1-210-283-2882 Web site: http://www.tsocorp.com/

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