I was experiencing the same thing. The outside front tires were wearing out faster that it should have. I haven't been driving that hard and no autox's.

So this weekend I check the toe and I had freaking 3/8" toe-in!!! Jeez, I would've balded a set of tires in probably 8k miles with fairly easy driving. I reset the toe to zero but this should be a warning to you guys to take a quick look at your toe. If your toe is off as much as mine, it will be visible.

 

Whats the stock toe setting? If you want your car to handle, a good toe setting helps quite a bit. Maybe mitsu did it on purpose?