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R1DER said..
What happens when you put acetone or toluene in your fuel? How much do you put in?
Toluene is an octane booster. Addition of up to about 10% is safe.
So back when I used it, I put about 6L in my tank to increase premium 95 to about 98 octane. At times for drag racing I added it to AvGas (which was 100 octane leaded) and it worked great :)
From memory the cost was only marginally better than using the stuff in a bottle from Repco.
Dunno about using acetone but I wouldn't as it ain't kind to rubber - fuel lines, seals etc.....