Yea for my application I'm not about to pour any toluene into my system but the article reposted on 3800pro is pretty informative.

I've probably run close to 20 gallons of Toluene through my car over the last 3 or 4 years with great success. I use it to bump octane for testing smaller pulleys only.

Will, I've a question for ya regarding the Touluene.
I've a buddy that races semi professionally in the local Nascar Dirt tracks. I don't recall what octane racing fuel he buys but If he mixes Toluene 50/50 with pump 93 he should get 107-110.

Would this be simular to racing fuel? I think he buys 104, not sure but I can find out. Just trying to save him some green$$$

No, the aromatic content is too far off gasoline to run it that strong. He'* probably restricted on his fuel anyway.

The rule of thumb (at least on streetable cars) is to never exceed 30% toluene. That being the case, the highest safe octane he could produce would be 100 octane (from 93 octane base). Race gas would be better for performance.

Again, I use it for octane/pulley testing ONLY.

Noted and Thank you. I didn't even think about the regulations he has to run under... and you most probably right that he couldn't run it even if he could.