"I wouldn't use a tankful of 100 Octane on any car unless you have special fuel/timing mapping for it."
I dont know, I probably would have tried it if I had a stock ECU just to try it out, such is my nature. In my case I got in touch with the folks that did the remapping of my ECU and asked them if the program would respond to higher ocatane fuel.
They said it should, and when I put in the racing fuel, the car did seem to run a little differently, seemed a little quicker with the butt dyno, and gurggled more when letting off the gas. When I ran it on the dyno, it looks like it picked up about 5hp with the racing fuel, so in my case it seemed like it was doing something.
Ed
