I've noticed that on a Celica from my own experience and others here (just can't dig up the link) that the tires on a Celica will wear more than say a Kia, just for example. I went through my stock Michelin Pilot, and yes I had Michelin stock, and Pirelli's in 2-3 years. Completely worn down till no tread was showing, like slicks. I'm now on/off with dedicated snows and "performance tires". It's funny because I've driven more miles on the snow tires up till June or so and they seem to have no wear. My new tires I know won't last more than 15,000 miles because it shows already. A lot of fun though. 30,000 and you have at least 10,000 miles to go and get new tires so don't fret.