Oh, look, it's a gas station. It's late. The mini-mart is closed. I'm not sure why I took the picture.

Tire pressure, it turns out, is measured in PSI (pounds per square inch). Yes, Chile is a Metric country. The PSI tire thing is (according to Jose) a holdover from all the US mining companies that were in Chile years ago. All those mining vehicles created a de facto standard that Chile never felt a need to change.