there is a break even point on E85. enkei hit it on the head. depending on the vehicle it changes the difference required. what is a myth is the idea that E85 causes higher food prices. even with the increased demand for corn, production has risen to match, mostly thru hybrids that produce more. i dont know everything there is to know about it, but i dealt with it a fair bit before joining the army. E85 was never intended to replace regular gas, just help. im of the opinion that diesel and CNG is that way to go, but what do i know.