$5/gallon right at the track. The 100 octane doesn't seem to sway with the rest of the gas prices. You'll probably use one whole tank, and I bet you'll average 9-11 mpg. I got 9, but I run 17# boost. ;) I put ~160 miles on my car last time just on the track...
“Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius--and a lot of courage--to move in the opposite direction.”