Flex Fuel (51-83%)

Garrett Ellison said

Buy e98 by the drum and mix with non ethanol non leaded pump of the highest octane available. If just works better unless you buy racing e85 by the drum. It's less expensive than buying the e85 by the drum, though.
Ethanol % Calculator

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There is a company about 4 hrs away from me that sells E98 by the drum. I haven't had time to see if there were any other local companies but it's on my to do list. Compared to a drum of VP110 if I were to mix it it'd still save $$$ even for the drive