Quote
One thing to keep in mind when calculating your MPG too is tire size. If you have larger tires, you will show MPG that is higher, as you're recording less miles than you actually drive. Also, if the truck has smaller than factory tires, you would likewise show lower than actual MPG.


I think that's backwards. Bigger tires travel farther across the road for the same RPMs, and hence log less relative miles on the odo.
(At least I hope that's the case. If not, then I'm getting 12MPG with 33s! <img src="/forums/images/graemlins/zombie.gif" alt="" />)

Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand!
Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top
Her Truck: 03, 3.8, 20th Anniv, 65k
Daughter's: 06 Eclipse, Keeping it Mitsu!
FSMs: MitsubishiLinks.com