Toluene is only $15 and if it's being sold for more than that, go to Home Depot and get Xylene, it's also $15 a gal and the exact same thing. If you buy big barrels of it the cost drops down to about $5 a gal. I'd run straight toluene if my fuel system could support it due to the rising cost of gas.

FYI, the turbocharged F1 cars in the 80s ran straight toluene albeit with an additive to lower the octane down to 102 or something.