Ethanol has about 33% less energy than gasoline. So you will be burning more. It may be cheaper but you will get less mileage. Also if your car isn't made for it expect problems. The fuel pump and level sensor will most likely fail. You would need to buy a pump made for a flex fuel vehicle. And I would expect the level sensor to fail often due to the high conductivity of the fuel. As mentioned earlier O rings and other gaskets not made for it could also swell and cause problems. This would not be worth it just go buy a Taurus if you want to run the E85 it will probably be close to the same cost. Trying to run E85 would most likely be a continuous headache.
