[s-cars] Toluene/Gasoline mix ratio

[nard1 at cablespeed.com]

I spent 20 minutes in the archives and did not find.
Some time ago there was discussion about using toluene to up the octane of
gasoline.
I went to the local ACE and they ordered me a 5 gallon pail for $25.
What is the preferred ratio? Or is it a trial? I'm thinking to try somewhere
in the 98 range?
Thanks,
Tim Leonard
ESCARGO
Michigan
ABB