My friend and I had stopped at a gas station to get air and the pressure gage seemed to be way off. We decided to just cut our losses and go to Midas. Felt a little embarrassed to be taking care of air, but they did not give any indication that this was out of the ordinary. They had us immediately pull up and proceeded to check and fill each one of the tires. My friend didn't have the air caps, but he explained the importance and where to read the actual tire pressure you should fill to instead of the one on the tire (turns out it's in the door). He gave us new tire caps completely free of charge and sent us on our way. Incredibly nice people.