it's basically like what fallout boy said, they add ethanol to keep fuel prices down it will run with the ethanol, but just know that the car isn't tuned for it so it will run like crap and cause your mpg to go down...the added ethanol is also the main cause of build up on injectors causing them to stick...if you run e85, you will definitely damage components though because the characteristics of the fuels are totally different
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