Following an 8.8 earthquake in the area of Chile, the entire Pacific basin has been placed on a tsunami alert. Current estimates are that a tsunami wave will hit the area of Hawaii at approximately 11:20 am local time. Tesoro is monitoring the situation and will take any steps deemed necessary.

Tesoro maintains adequate inventories of fuels and we do not anticipate shortages but we urge all citizens to refrain from buying fuel beyond their immediate needs to preserve fuel for emergency vehicles. Tesoro has decided that we will not raise fuel prices during this crisis.

Please contact Lynn Westfall at 210-626-4697 with any questions.

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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