I get my fuel from VP.
http://www.vpracingfuels.com/vp_01_f...D802571287CBD3
I use the C12. Mix 7 gallons of 108 with 10 gallons of pump 91. That comes out to 98 octane. Thing runs like a beast. Plus, from what I am told, the small amount of lead is good for the motor...Is this correct guys ?