bdubsee, I think the barometric pressure makes the tires deflate. I have this problem in both my cars and, yes, they both have aluminum wheels. I don't recall it occurring when I lived in the midwest.

Wasn't it so much nicer when a service attendant came out, pumped our gas, checked our oil, and checked the pressure in our tires. All that for about 25 cents a gallon. Were we spoiled or what?

 

That was too far back for me to remember. (.25)
Anyway, where you gonna find a person at a gas station who can do all those things competently nowdays, besides, everyones behind bullet proof glass in my neighborhood.
Anyone walking around the lot, I tell them, "Please step away from the vehicle".