T2 - Super Slicks? The hardest racing tires? You should get about 10 laps out of those at least. Sounds like either the setup is funky or maybe you're sliding it too much.
Can you post your suspension settings?
Other than that, you could be braking too late and sliding too much, which does take its toll on the tires. I try to brake early - at least as early as when the gearshift indicator flashes, telling you the brakepoint - and avoid turning under full brakes. I like to slow down early enough that I can get back on the power right after turn-in.