Does use of E85 harm the vehicle engine?
Use of E85 actually keeps the fuel system clean and acts as a gas line antifreeze. Since the major differences in a flex fuel vehicle are the materials used in the fuel system, 85% ethanol fuel does not harm these engines. E85 can only be used in vehicles designed for its use. Some materials excerpted from ACE (American Coalition for Ethanol) and the Minnesota Department of Commerce.