Acccording to a local distributor: Ethanol is corrosive to pipe lines thus needs to be trucked. All vehicles should run fine on ethanol. However, as we convert to ethanol and it loosens the crud in all the tanks, filter changing may be more frequent until everything gets cleaned up from the refinery to our engines. I never buy gas when a transport is dumping gas thus giving the trash and water time to settle below the pump intake. MTBE studies indicate it gets in our water and is bad. Ethanol requires the gas to be refined a different way, resulting in increased refining expense for the ethanol conversion.