A very interesting read. It is very well footnoted with petro studies. Seems the more boost you are using the better the benefit you receive from toluene. The F1 guys later had to delute toluene with a 0 octane filler to fall under rules."toluene was used extensively in the turbo era in the1980s by all the Formula 1 teams. The 1.5 liter turbocharged engines ran as much as 5bars of boost (73 psi) in qualifying and 4 bars (59 psi) in the actual race. Power outputexceeded 1500bhp, which translates into 1000bhp/liter, an astronomical figure."http://www.elektro.com/~audi/audi/toluene.html