FWIW, the past couple of years, Discount has been inflating car/truck tires to a few lbs over sidewall in their free air check bays. It's because the tires are no longer "cold", due to just driving to the shop. My van's tires are rated 35 psi cold, so they regularly go to 39, especially in the summer. I've asked them a couple times when preparing for a summer trip and a loaded van, to go to 40. If I'm 1-2 over the next morning, I can live with that. With my daughter, s-i-l, and grandkids in the car, I ain't taking chances!
Lyle
