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Do EPA fuel economy estimates account for the use of ethanol blends that are common today?

April 26, 2017account blends common economy EPA estimates ethanol FUEL today

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Do EPA fuel economy estimates account for the use of ethanol blends that are common today?

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No. The EPA fuel economy tests use 100 percent gasoline, and no adjustments are made to account for ethanol. Most conventional vehicles using E10 (10 percent ethanol) will experience a 3 to 4 percent reduction in fuel economy.