Originally Posted by Jim_in_PA
Running tires too low can result in "not normal" wear, modified handling and so forth. Most tires are adaptable to a reasonable range; 34 psi cold isn't horrible, but for many folks, it would feel very soft for a 5000+ lb vehicle. I don't like mine at 36 psi cold (which is what is on my door frame sticker) and prefer the 38 cold I previously mentioned. They run at about 41psi "hot"...which at highway speeds works for me. I get good fuel economy, too.
Jim, I'm with you on that. I too try to keep all 4 at 38 (36 - 40). Check on them every time I 1st start it up and again when I pull in the garage when done for the day ! I don't air up or down though till the next day IF needed, and I don't until the readings are "updated," which takes a few miles of driving. ps; of course how hot or cold the air temps. are must be taken into account !