(Source: Business Wire)Tesoro Corporation ("Tesoro") (NYSE: TSO) today announced that the first barrels of crude oil have been shipped through the reversed 81 mile Petroterminal de Panamá (PTP) trans-Panamanian pipeline from the Atlantic Ocean side of the Isthmus to the Pacific. This reversal establishes a new conduit for the flow of crude oil from the Atlantic Basin to the Pacific and will enable Tesoro to source a broader range of crude oils to supply its Pacific Rim refining system. Mr. Doug Koskie, Vice President of Arbitrage Trading, Tesoro Refining and Marketing Company, said "In addition to exposing Tesoro to an array of crude oils typically marketed in the Atlantic Basin, our abilities to utilize the tankage dedicated for Tesoro's exclusive use at PTP and the reversed pipeline are expected to afford our company strategic advantages related to freight, storage, blending, and delivery scheduling optimization."

The first oil through the pipeline is Castilla Blend crude sourced from Colombia, which Tesoro will process at its refineries in California.

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 880 branded retail stations, of which more than 390 are company owned under the Tesoro®, Shell®, Mirastar® and USA Gasoline brands.

This communication contains statements that constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on current expectations and beliefs and are subject to a number of risks, uncertainties and assumptions that could cause actual results to differ materially from those described in the forward-looking statements. These risks and uncertainties are more fully described in SEC reports filed by Tesoro. While Tesoro makes these forward-looking statements in good faith, management cannot guarantee that anticipated future results will be achieved. Tesoro assumes no obligation and expressly disclaims any duty to update the information contained herein except as required by law.

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