I think your car is particularly easy on tires, but in a FWD, they certainly go away towards the end of a sprint race. Case and point is Paul Ronie at Roebling at the last SIC. I watched in 3, and 5/6 and you could visually see him getting the tires greasy during the last 1/4 of the race.
That was also my experience on them in the SSC Civic.
-Tom
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