UPDATE 1-BP wins as U.S. refiners suffer under biofuel mandate
By Sabina Zawadzki July 30 (Reuters) - BP Plc said on Tuesday it did "quite well" during a recent spike in the price of U.S. ethanol credits that is costing some U.S. refiners hundreds of millions of dollars. U.S. refiners are obliged to blend a certain amount of renewable biofuel, m
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