Incorrect C-47 fuel readings

[FeuerFliegen]

I don't understand how I'm supposed to measure how much fuel I have left in the C-47, as the amount of liters I take do not match up to the amount of gallons I take (unless I take exactly 50% or 100%)

I took 380L, which is just a hair over 100 US Gallons- the right and left aux. tanks read 80 gallons each (160 total).

 

I tried a few other readings too; since 160 gallons is 20% of the 804 gallon capacity, I selected 20% fuel, to see what it would show in the cockpit; it said I had 120 gallons per both aux. tanks = 240 gallons total; clearly not 20% of 804.

 

I tried it again, seeing what it would show if I put in 910L (240 gallons).  It showed me approx. 360 gallons total on the fuel gauges.

 

 

And while I'm at it, I've had similar issues with the Ju52; the readings on the fuel gauges never line up with how much fuel I actually have.