You know.. there may be a point of diminishing returns. I am sure there is with tires. The fuel economy experts only say "3.3% for 5 psi under the manufacturer recommended tire pressure." However, we don't know if or how much that correlates to over. Personally, I haven't noticed a difference on the highway between the lame 30, and running 40 psi cold on my LTZ. However, it does coast slightly better with higher psi, obviously. So how much rolling resistance is actually going on there is tough to quantify. It would be an interesting study.
100% false.Ok, heres another question tha...what PSI is the best for the maximum tire tread life on the FR710 Firestones?? If you guys that are running 40PSI, I would bet that will shorten the Firestone's tread life!
I would think the ideal PSI to get the most out of the Firestones would be 34PSI.
Try 38. Anything more is uncomfortable on the Firestones.