[brucepick]

When the seasons change I try to check them more often. The change in air temp causes changes in tire pressure - especially important in fall when the temp drops. 20-30 degrees of temperature drop plus a very slow leak can mean pressure much lower than what you wanted.

I try to get a look at them every day, and I admit to putting the gauge on them only every 2-4 weeks.

I found one tire low (20 psi) on my old Volvo this week; I tracked it down to a cracked valve stem. First time I've ever seen that happen. Bought those stems at a big box parts store - should have just let the installer put in regular ones.