I had this alignment done 3916 miles ago:

And this is the result:

I should of changed them at about 3500 miles as it was a pretty slippery the last 3-400 miles. I now have almost 13000 miles and have just installed my 5th set of rears and third set of fronts.

 

I assume you are not tracking the car, but otherwise you should get 10,000 miles out of tires unless you are really tearing it up.. =)

 

This car has never been on a track!!!! All "street" miles.

 

5th set in 13k miles. That's nuts! Something is amiss here.

 

That's 4 sets of rears in 13k miles or 3,250 miles per set
Considering these are MPSC, I would say that is normal.
I believe they have a wear rating of only 80...I got only 5k from the rears on my 996TT (Pirellis), and expect only ~3k on the MPSC on my GT3.

Bill

 

That is crazy, throw some PS2's on the car!

 

MSPCs heat cycle out very fast and then they wear quickly! if you are not tracking at all put some PS2s on the car....also if you have your car set for an aggressive track alignment and drive around on the street with a lot of negative camber that will happen to your tires! you have to set the car up for what you plan on doing with it! Are you looking to track the car at all?

 

I agree with earlier comments. If you are doing no track time then you can reduce your rear negative Camber. That will help, and run PS2s. Also do you accelerate hard, often? Also if I am reading the chart correctly you have Negative toe in front which should not be necessary, unless you are tracking it.

 

If you are not taking it to the track, PS2's will last you much longer and perform better in the wet for the type of driving you are doing. Congrats on the 13k! From your tire purchases, you must be loving it.