I've found that when it gets very cold tires lose pressure, but never gain it back when it warms up. Having a compressor in the garage is very handy. PSI fluctuations are a significant cause of tire failure.

 

Just learned that's true with anything holding air. Got air bags on the truck and when I checked them this past weekend they were at 0psi, glad I got the bump stops built in. Had them at 5psi a month ago. Guess I'd better be checking more often with this crazy weather.

 

My owners manual says 37 psi front and rear, But seems rough. So, I ran it at 33 PSI front and rear with only light loads. Seems to ride smoother.

 

Just went out its about 40 degrees .Was going to bring them up to 35 . The sensors says the tires are at 33 my gauge says 35 how accurate are the sensors ?

 

Others may differ, but I trust a $55 TPMS sensor more than I trust a $1.99 tire gauge.

 

I paid $2.15 for mine!

 

Went out add some air . For the 4 months i have had the truck when cold they read F32/32 B31/31 . Right now when i checked the sensors they read ( 53 degrees outside) F35/35 B35/34 . Which is what my gauge read . Took it for about a 4 mile ride they stayed the same.

 

Back in November after an oil change, I put the air pressure up to 40 psi cold. I was anticipating a trip that included 7500 feet altitude and below freezing temperatures. Today the air pressure is at 38 psi cold, and 40 to 41 psi warmed up. Day time temps here have been between 70 and 95 degrees.

Not bad having a 2 psi drop in 4 months.