There is a mom & pop gas station near me that sells cam 2 race fuel. I buy it 5 gals at a time in a gas can. (It is illegal to pump it into a street car at the pump.) I add 2.5 gals to my 17.5 gal tank when I fill up with 93 octane. It prevents my Roush 427R from dieseling when I shut it off. I don't know that the car is any faster with it, but the fact that it stops dieseling at shut off makes me think that it may well stop any pinging I might get under hard acceleration. Plus it smells sooooooo good.
