OK, so I drive a Honda, and I'm using my tire gauge to measure the pressure of my tires. PSI, I think. Two of them measure about 44PSI, but the other two measure about 20PSI. I have tried it many times, and two measure 44PSI but the different two still gauge 20PSI. So, I brought my car to my mechanic. My mechanic told me, "We tested them, and they all have sufficient PSI." But now, my tire gauge still says 20PSI. I brought it to my mechanic again, and he says they're all fine. What should I do? Read more: Help me with my car's tire gauge?