well my tires are like 1.6% off, (according to the tire calc) so i dont think that is the problem. (unless 1.6% really is a big diffrence) i feel like a "noob" when it comes to this stuff, but i just filled up today and i am getting around 12-13 mpg. after doing a little division of course. so unless i got the wrong size for the stock tire, is there any other thing that might be wrong? or is this mialage what we are supposed to be getting?