Premium Fuel

[Guest1089]

I’m surprised my 2.7ho turbo doesn’t need premium, I tested it with 87 vs 91 10% alcohol and the difference was negligible. Now straight gasoline returned much better numbers but that’s not octane related. Too bad straight 91 octane is $1.00 a gallon more expensive, the cost negates any returns.

I've run E15 here ( thats 86 octane) with great results but I mix up to 87 octane with 91 gasolines. I can mix up to 88 octane and thats a sweet spot for my L3B. If yours is the HO version of L3B I am betting 88 octane would be a good place to run it.