Been reading alot about octane boosters and most of what i have seen is that they are complete crap.putting about a gallon of toluene in the tank seems to be the only way to get the ron no. up i live in Ireland and we now have no one selling high octane fuel only 95 ron i was using proboost and got a breakdown of the ingredients toluene xylene and m.e.k.I know this has been debated alot and i have checked previous posts but i would like to hear from any one using a" home brew " .i am very tempted to try it but would like some reassurance