I have a 500 gallon propane tank with a small leak. My question is Would a 500 gallon propane tank leak more propane if it was filled to 80% capacity or would it leak at the same rate if it were filled to 30% capacity.
IF it stays gas inside the tank rather than liquifying then this is easy: To put gas into a tank you need to pressurize it. The more you put in the harder it gets. "capacity" probably means how much you can safely put in before it bursts! Therefore at 80% it must be at a higher pressure and leak quicker.
Same rate. You would just take longer to run out.
The pressure does not change, so it would leak at the same rate.
If the leak were the same identical size, the leakage rate would be identical. Pressure, inside a propane tank, is the same, no matter how many gallons it containes.
Get that leak fixed what ever the size. !!! The supplier is required to complete a leak test on the system. There should be zero leaks with the tank or fittings.
I have a 1993 ford taurus 3.8L V6 automatic GL. If you think you might have a "vacuum leak" then how would you check for it?