I will say it I have used octane booster and have made some good power! the ones I like are REAL LEAD and NOS off road, fuel additives. the REAL LEAD is supposto be the same stuff they put in race fuel to make the fuel high octane the more OZ,s per gallon you put in the higher the octane works preatty good I think you can go up to 118 octane? And the NOS stuff is supposto have NITRO mixed in it if you get the OFF ROAD formula. I have tried the Lucas stuff before and was not impresive to me at all! its all trial and error google REAL LEAD and give it a try