Being a strong solvent, I would not use toluene for a daily driver, since it may cause reliability problems with fuel pumps and fuel dump valves at the TBI or FI.
Note: The following is for educational purposes only:
For my racing associates, I recommend a mix of 4 oz. of toluene, 2 oz. of Fuel Power, 1 oz. of Neutra, and one bottle of the Pennzoil Octane booster (with MMT) per 10 gallons of 90+ octane fuel. This puts the fuel in 110+ octane range. I really prefer the base fuel to be a 10% ethanol blend.
PS - I hope you have torqed the head bolts correctly and have used high quality head gaskets when running this mix.
[ February 13, 2003, 11:37 AM: Message edited by: MolaKule ]