Theres a guy at work who absolutely swears by the tornado he put in his ferd powerchoke. Said it didn't change his wifes saboobaru though. Who knows?
I've read a few papers on adding acetone to your gas, anybody tried that? It's one of the main ingredients in most octane boosters, the stuff is way cheap and you can get at any decent hardware store. The biggest problem is it will evaporate before you can get it in the tank so you have to pre-mix it, then dump that in the tank.
Any takers? Maybe I should try it in my ferd truck.