When running unloaded and over the road I run 38 fronts and 35 rears, and have since the first week of ownership (mine were delivered with ~50 lbs in each). And those settings might still be a little over inflated, despite matching / being less than what is marked on the door jamb. After 17,000+ miles at those pressures, with regular tire rotations, I am noticing the centers are visibly more warn than the outer edges. The tires are not worn out or anything like that, but they now have enough wear on them to tell a distinct pattern of center wear. Center wear is a classic symptom of over inflation.
I may try to drop another 3 lbs per, to 35 front / 32 rear, and see how the wear is then.
By the way, use a good gauge, don't go by the dash readings. The dash indications are close, but mine are typically a couple pounds off, either way, of what I read on a good gauge. I think the TPMS / dash indication combination is a "close enough" thing for safety purposes, it will tell you when a tire is grossly out of range.
T!
