Quote Originally Posted by maillotpois View Post
Does overfilling your tires really improve mileage? Any down side? I just had to get new rear tires. Wondering if I should put some extra air in all of them...
No no nooooo! Most of my friend's back in Oregon were "Schwabies" who worked at Les Schwab Tires, big huge west coast tire retailer. Anyway, keep them at the recommended PSI and make sure you maintain it. Over inflating is asking for trouble, and it will cause the tires to wear all messed up. I dunno what passenger tires run, but my truck is $200 a tire. No small change to maybe save on gas.