All of this talk about tire pressure prompted me to ask my mechanic to check when I took my car in for service this morning. They did that, topped off all the fluids, and tightened a loose clamp that was causing a metal scraping sound. Took half an hour and they didn’t charge me for any of it! I suspect it’s because my car is 12 years old and they are hoping I’ll buy a new one from them soon. I will eventually, but my car is in great shape and only has 55K miles on it, so it’s going to be a few more years.