Yep, mpg is about the same once you do the conversion for the difference in the tires. Miles X (new tire diameter divided by OEM tire diameter) divided by gallons refueled = mpg. Is working out about the same as before the new tires. Obviously, its worse if you don't do the conversion by about a mpg or two. I hashed that formula out with my 1999 Honda CR-V after I had up sized the tires on it and bounced it off a few brainiacs in order to make sure I wasn't throwing crap into the computation before running with it.My 06 Sport has never seen 23 mpg's... 20.8 was the best it's ever delivered. My average was a little less then sgtsandman at 18.2... most of my miles are blowing down the tollways at about 70 mph. I did upgrade tires in the last couple thousand miles... I need to check it again. I was hoping for an increase with the 32... well 31.9 inch tires. It dropped just about 300 rpm at 70 mph.
sgtsandman... I know you just went to 265's yourself... You checked your mileage after they went on?