Gas being added unnecessarily. I have a 100 gal tank and a 300 gal tank. They only put in 60 gals. That is a wasted trip. I realize past recent history would lead one to think i used more gas. But that was during the winter [not the middle of summer] and last winter I was heating a new house and the old trailer. But January I stopped heating the trailer because we moved into the house. I told the local people this and also told them I expected my gas usage to go down because of the extra insulation even though the house is 4 times as big as the trailer. Also late December on one of the colder days and night I turned the furnace off for 24 hours. The temperature in the house with no heat and no activity lost only 6 degrees from 71 to 65 degrees. Which told me I was going to use less gas than I had been.