Flex Fuel

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Flexible fuel vehicles (FFVs) are designed to run on ethanol (E85), gasoline or any blend of the two. Except for a few engine and fuel system modifications, they are identical to gasoline-only models.
 
FFVs have been produced since the 1980s, and dozens of models are currently available. Since FFVs look just like gasoline-only models, you may have an FFV and not even know it. To determine if your vehicle is an FFV, check the inside of your car's fuel filler door for an identification sticker or consult your owner's manual. FFVs experience no loss in performance when operating on E85. However, since a gallon of ethanol contains less energy than a gallon of gasoline, FFVs typically get about 20-30 percent fewer miles per gallon when fueled with E85. (Source: EPA, Fueleconomy.gov / Photo: Wikimedia Commons)
 

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