Thought there was 1/2 tank. Did someone steal my gas? I wondered if parking on a hill was the issue. Even if I was empty, I was going to run out because the nearest station was 10 miles away. Then I checked the trip meter. I had only used 14.5 gallons. Between thinking I can always call triple A, I kept thinking it must have been that hill. The gauge crept up over the next 20 minutes to just under a half.