2008-06-17 04:13:36 -

www.tsocorp.com - Tesoro Corporation ("Tesoro") (NYSE: TSO) today announced that it has promoted three of its executives to Senior Vice President positions.

Susan Lerette, VP, Human Resources, has been promoted to SVP, Administration, and continues to report to the EVP and Chief Administrative Officer (CAO) for Tesoro Corporation. In addition to her Human Resources and Facilities

Management responsibilities, Lerette will also oversee Procurement and Aviation.

Otto Schwethelm, VP and Chief Financial Officer, has been promoted to SVP, Chief Financial Officer and Treasurer and continues to report to the CAO. Schwethelm is responsible for Accounting, Investor Relations, Treasury, Information Technology and the Enterprise Program Office.

Scott Spendlove, VP, Asset Enhancement and Planning, has been promoted to SVP, Risk Management and reports to the CAO. In this role, he oversees a newly formed function that includes Enterprise Risk, Trading Controls, Business Insurance, Internal Audit, Credit and Security.

Since 2004, Lerette has held the role of Vice President, Human Resources. Prior to that, she was Vice President, Communications and Investor Relations from 2001 to 2004. Lerette joined Tesoro in 1981 and has held positions of increasing responsibility in Investor Relations and Accounting, including budgeting and corporate financial reporting roles. She holds a bachelor's degree in business administration from Texas State University in San Marcos, Texas.

Schwethelm was named Vice President and Chief Financial Officer in June 2007 and prior to that, he held the position of Vice President, Finance and Treasurer. He joined Tesoro in 1998 as Manager of Economics in the Supply and Optimization organization. He has also served as Vice President of Development and Business Analysis and Vice President of Shared Services, a department he started before being named Vice President and Controller in 2003. In March 2006, Schwethelm was named Vice President, Finance and Treasurer. He has more than 20 years of experience in the oil industry including seven years of international experience with Saudi Aramco. He holds a bachelor's degree in business administration from The University of Texas at Austin and is a Certified Public Accountant.

Prior to his new position, Spendlove has held positions as Vice President, Asset Enhancement and Planning, Vice President, Strategy and Long-Planning, Vice President and Controller, and Vice President, Finance and Treasurer. Prior to joining Tesoro in 2002, he served as Vice President, Corporate Planning and Investor Relations for Ultramar Diamond Shamrock Corporation (UDS). He also held various positions in investor relations, accounting, finance, forecasting and planning at both UDS and Unocal Corporation. Spendlove holds a bachelor's degree in accounting from Brigham Young University and a master's degree in business administration from California State University-Fresno.

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 more than 445 are company owned under the Tesoro(R), Shell(R), Mirastar(R) and USA Gasoline(TM) brands.

Please visit us at www.tsocorp.com

Tesoro Corporation, San Antonio
Investors:
Scott Phipps, 210-283-2882
Director, Investor Relations
or
Media:
Natalie Silva, 210-283-2729
Director, Media Relations