Running e20 fuel?

[Goldenrocket06]

So around me I can get e10, e20, and e30.. My question is besides crappy gas milage, what other harm could it do? I know ethanol to us is cheap race gas and it brings kr down.. And I was wondering that if I were to run it, it would help.. Also sorry for being a fng.. Lol

[ADrugDealer]

I could see it being ok but without a tune its dumb. You won't get all the benefits.

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