car dealers do not warranty tires, tire manufacturers do, however this sounds like either u have been tracking the car or you hit some bad holes and got the alignment out. get the money out and get it checked. If you cant afford it then ......

 

+1. A wrong camber setting will not eat up a tire as fast a wrong toe setting.
I had a 91gsx and the front toe was off a bit and outside of the front tires got worn down to the metal cords in less than 2 weeks (maybe 200 miles). The rear toe was fine but camber was -4* and those tires lasted forever.

here's a pic of the rear camber.
http://www.we-todd-did-racing.com/vi...l/367677_3ef0f