Originally Posted by Pelican
I thought so too, but my Lexus came with nitrogen and the PSI remained constant for 2 yrs +- 2 psi depending on temperature and never needed to top up.
This spring I put new tires on and now that the weather is cooler I see fluctuations of 2 degrees and the weather isn't cold yet. One should lose 1 psi every 6 degrees centigrade. I think I'm going back to nitrogen.
According to the Ideal gas law, nitrogen and air expand and contract with temperature virtually identically. So, your observation is somehow in error.
I thought so too, but my Lexus came with nitrogen and the PSI remained constant for 2 yrs +- 2 psi depending on temperature and never needed to top up.
This spring I put new tires on and now that the weather is cooler I see fluctuations of 2 degrees and the weather isn't cold yet. One should lose 1 psi every 6 degrees centigrade. I think I'm going back to nitrogen.
According to the Ideal gas law, nitrogen and air expand and contract with temperature virtually identically. So, your observation is somehow in error.