I know it's amazing goldie, but if you push the 5 and the 2 on your keypad, you can
actually see all the gauges!
All of the redone aircraft have overall fuel gauges. One measures the current tank, the other the overall remaining fuel. In most planes, the needle represents the tank and the red arrow (real life equivalent is the bingo bug) shows the overall percentage of fuel. In the P-47 series, they are side-by-side needles.