I see wrecked fuel systems weekly, bad fuel sending units, weak or leaking injectors failed fuel pressure regulators, destroyed charcoal canisters and vent solenoids. E85 is much worse, it highly dilutes the engine oil with fuel and fuel additives in just a couple tanks used, it eats aluminum, rubbers including the seals the oil comes into contact with. If I run non E in my truck I get + 2-3mpg. Ethanol burns cooler with less power aiding in less complete combustion requiring more fuel for the same output. As a country we would be better off moving towards peanut/sunflower/palm oil production for diesel engine fuel than corn.