We run on E-90--our own brew from pump E-85 and a supply of E100 from a "benafactor" at an ethanol plant. Same issues as running methanol with the seals and all but it has 114 octane and is a whole lot cheaper then race gas. We can run higher compression and have no heating issues. It does take a bit more fuel as Tech said. All in all we're real pleased with it and will be sticking with it again this year.