For what it's worth I run USGT on asphalt tracks. My buddy and I have tried every combination of tires and saucing (New tires, old tires, and many sauces). It has gotten so expensive that I think I will race modified for the next State Series. The tire wear will be about the same.

My team just won a 500 lap enduro race. We used USGT bodies, a 21.5T motor and Solaris tires. The tires lasted 500 laps. These tires are clearly superior to the USGT tires. A long time ago we used to run 21.5 TC with Solaris tires, but this was cancelled as a hand out motor class was instituted (Great class). My point here is that USGT is a great class, but because of the wear, the class is more expensive. I run at several tracks and depending on the track I can use used Solaris tires and there will not be a drop off on lap times. Hence, more affordable racing. FYI, I spend a lot of money on racing and will never cheap out if it affects performance....