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I am not real happy paying these high dollars in fuel prices , I want to pay more!!!!! hahaha What is a good fuel additive that will increase octane, while adding a lead substitute? As of now, South Carolina has no emissions testing (lucky me), so brand is not real important just looking for the best for my 401. I do have the high compression heads ( 51cc)and figure 10.5:1 ratio. Is that 104 just good advertising? or does it really work? If it is good, which is better black or red ? ( What is the diff) Thanks again for the invaluable help...seeya...

1979 CJ-7 401 T18
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