I wanted to put some air in the tires on out way out of town since its cold.
I'm interested in this. Say you start with 95 psi in the tire shop at 20 degrees C (293 Kelvin). Then drive out into -20 C (253 K). The pressure should fall to 253/293*95 = 82 according to some physics formula. Should you leave it that way knowing it will rise as the tires heat up from driving? Or figuring the tires will run a little cooler in cold weather, would you run the pressure up a little, maybe all the way to 95 at the outside temperature? I wouldn't bother adjusting the pressure every time the temperature changed a few degrees, but from the warm tire shop to an Alberta winter is a big change. Would the tire shop take this into account? Should the pressures on the vehicle info sticker be for all temperatures or just summer in Detroit?