Engine Builders-KB356 Piston Milling

I’m running 10.2 with 2.02 j heads. There’s a few ways to skin the cat. Run 93 non ethanol, or add some octane booster to 87, mix 100 Av gas with 87... or mix in some leaded 110 race gas to 87.

If anything, he'll NEED the ethanol 93. The added alcohol helps add to detonation resistance. Alcohol is a higher octane than gas.