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How would Nitrogen not loose pressure with a 42 degree drop in teperature? It still must follow the ideal gas law: PV=nRT
If we do some Mathemagic we end up with:
P1/T1=P2/T2
Pressure Divided by Temperature. Before and after.
so 33/289=P2/265 <==Gotta put temp in Kelvin
Cross Multiply
8745=289(P2)
P2=8745/289=30.2 PSI
You still loose pressure even with an ideal gas (which Nitrogen isn't) which has no moisture (Nitrogen is dry).
Yes you loose a bit less pressure than humid air, but in genneral it's not worth any extra hassle.
And Midgad:
Yes you need to check and adjust your tire pressure at least monthly like the manufacturers reccomend. Just do it every time you wash the car, or fill up or whatever routine works for you. Or just listen to the TPMS. (Those became mandatory because people wern't checking their tires.) But Labammm is right, I've never really ended up with overpressured tires after winter. But remeber it's easyer for a higher pressure to leak out. So it may just seep out gradualy as the temperature goes back up in spring.
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