ACETONE AND TOLUNE BOTH ADD OCTANE TO THE MIX WELL ACTUALLY DANGLING BONDS OF CARBON ON THE CHAIN OF HYDROGEN. THEY DONT ADD OXYGEN AND ARE BOTH FAIRLY OK WITH NO MORE THAN 20% IN GASOLINE WITHOUT DISOLVING PLASTICS.
i ADD 20% ACETONE AND ANOTHER 10% METHONAL.
BUT NOW THE GAS PUMPS ALRTEADY HAVE 10% ALCOHOL ADDED SO LIMIT YOUR METHONAL ADDITION 25% AND IT RUNS ROUGH CAUSE YOU NEED BIGGER CARB JETS FOR ALCOHOL BUT 10-15% ACETONE OR TOLUNE IS FINE AND SHOULD GIVE YOU MORE POWER AND LESS PING.
XYLENE ALSO IS GREAT , BUY IT AT HOME DEPO BUT DONT BREATH OR GET ON SKIN-CARCIGOEN FROM LONG TERM USE. NOT TO BE AFRAID, OCCASIONAL POURING WONT KILL YA UNLESS YOU SNORT IT TO GET HIGH.
A LITTLE LIGHT OIL IS ALSO GOOD 2% LIKE TRANNY FLUID AS A TOP CYL LUBE SINCE SOLVENTS WASH DOWN OIL FILM REAL QUICK.
CHEMICALS ARE FUN FUN FUN

PS ADD A LITTLE PURE OXYGEN FROM A 40 CUFT CYL MOUNTED IN TRUNK REGULATE TO 5 PSI AND IT WILL RUN LIKE YOUR AT 200- FT BELOW SEA LEVEL CAUSE LOW RACE TRACKS HAVE MORE DENSE AIR TO OXYGEN CONCENTRATION 19-21 % SO KEEP IT AT 22% OF TOTAL AIR FLOW ANY MORE AND IT WILL LEAN OUT INJECT IT AT THE CARB VENTURIES WITH AN ORIFACE.
i DID IT SEVERAL TIMES ON dEMOLITION CARS AND RAN ACETYLENNE AND OXYGEN 50/50 MIX ,IT WAS AN ANIMAL TILL IT MELTED THE PISTONS, I JUST SHOVED THE WELDING TIP INTO AN INTAKE VACUUM LINE AND CRANKED UP THE GAS TILL THE IDLE WENT CRAZY HIGH.