[Porsche-O-Phile]

Don't bother with octane booster in a bottle - that stuff is garbage and will do nothing. The best ones only raise you by about one tenth of an octane point.

You can mix fuel with either xylene or toluene to raise the octane. Do a Google search for toluene octane booster and read up about it (and yes, I've done this with excellent results in the past). There's a wealth of information out there. It allowed me to run very high boost levels on my old 951 without any pinging or other issues.