[budnate]

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Raising the octane from 93 to 102 is very difficult to do with boosters or other additives. The problem is simply volume. 16 or 32 ounces of additive can't chemical change 18 gallons of fuel. Advertising claims are designed to make you buy, but the reality is you'll need 5-10 gallons of race fuel to start raising 93 octane fuel. A couple gallons of toulene is also very effective if you want to expirement.

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I have heard/read that as well if you really have a 11:1 motor the little bottles dont work enough to get by on..I did the 50/50 deal with prem unleaded and 110 that the Union 76 guy had in a pump off to the side, when he quit I ran the same mix but with Av gas...both seemed to work fine and never heard a ping once...and with drag boats there either off or the pedal is on the floor and running hard across the lake.