How much of an increase in mpg can I expect with overinflated tires?

[jandree22]

Originally Posted by Jim Dunlop

Can anyone comment on whether it's better, on a front-wheel drive car for example, to run the front tires a couple PSI lower than the rears? For me, it's a cheap way (along with removing the spare/jack/carpet from the trunk) to give the car an aggressive stance. However, I wonder if making them all the same pressure, or running the fronts higher than the rears, would be best.

Run the same PSI in all 4. I can't imagine 5 or even 10 psi less in the front tires will ever be noticeable to the untrained eye of bystanders. The crap removed from the trunk is an interesting method to raise the tush, though. If nothing else it's overall weight reduction for the car, lol