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I have 12.5 compression with aluminum 72 cc heads in my street motor and run straight 110 Sunoco, though I think it could be a tad faster with 108.
When cats here mention 93 pump gas, do they really mean the actual 93 octane pump gas that comes from the pumps at the local Mobil, BP, Sunoco, Shell? If it is, I suspect many of you may at some point have problems stemming from all that ethenal that floats in the stuff. that is why I strictly use 110. I wouldn't put pump gas in my Mini-bike.

An alternative to this would be 94 unleaded and 100 unleaded Sunoco/VP I guess.



I use the 93 super unleaded they sell at my local BP,Chevron and Texaco. Have been for years and have had zero issues.

1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...