Question about filling 500 gal propane tank

The meter on the truck reads in tenths of a gallon. Whether or not the driver is filling the actual amount you are paying for i could only guess.
With propane there is "shrinkage" or a loss that they take, this is because of temperature changes and loss from the liquid in the hose. Place that fill small tanks, like bbq tanks have a loss of about 10%. They pay about a buck per gallon and sell for about 3 bucks around here.

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On the back of each propane truck there should be a temperature adjusted graph which shows what percentage to fill a tank at a given temperature. To state the obvious, at 100 degrees F. you can fill the tank to close to 100 percent with the knowledge that there is not much chance of expansion. Now when you are in the thirties they don't like to fill much past 80 percent. I would stand by and ask them why they fill in the 25 gallon units.

Every time I've been here when the propane guy fills my 500 gallon tank, they've filled it to the 80% fill amount. He's told me several times they won't go over the 80% fill for safety reasons. The amount is always some odd number just like if you filled your car gas tank.

The filler is either a weirdo that likes round numbers, or he is ripping you off by rounding up, or perhaps he overcharges a bunch of people and then fills up his buddies tank for free to balance the books. I know many people that fill their car/truck fuel tanks to a round dollar number or a round gallon number when it obviously makes no difference.

25 gallons of propane is a LOT. Enough cost to buy some fancy dinners. He certainly must log the fuel.

Before you accuse him of anything, it is entirely likely that he is just safely underfilling and not charging you for anything that you aren't getting. I would just ask why, when the meter reads to the 0.1 gallon, is your bill always to the 25 gallon increment? Let them look into it.

The filler is either a weirdo that likes round numbers, or he is ripping you off by rounding up, or perhaps he overcharges a bunch of people and then fills up his buddies tank for free to balance the books. I know many people that fill their car/truck fuel tanks to a round dollar number or a round gallon number when it obviously makes no difference.

25 gallons of propane is a LOT. Enough cost to buy some fancy dinners. He certainly must log the fuel.

Before you accuse him of anything, it is entirely likely that he is just safely underfilling and not charging you for anything that you aren't getting. I would just ask why, when the meter reads to the 0.1 gallon, is your bill always to the 25 gallon increment? Let them look into it.