My personal fuel procedures:
First, I figure how far I'm going. Less than a sector generally 50%, a sector or more I take 75%. Don't take a drop tank unless you're going far enough even 100% internal won't do, as the pylon will reduce your top speed slightly even after the tank is released.
I always burn the left wing down to ~1/8, then burn the right wing down to about the same. If I'm going far enough, I've usually got them both burned down before I reach the target (my flight profile generally involves a climb to 15k). From there switch over to main tank until dry. Use your wings as a reserve and disengage when you're down to a little more than 1/8 main. 1/8 all tanks should get you a little more than a sector on cruise settings.
F4U-1A is a MARVELOUS aircraft. You basically take the good points of the 1 and 1D (excluding bomb load) and blend them together. IMO she's the best pure fighter of the 1-series Hogs and in the right hands one of the best non-perked birds in the game. She's not the monster the -4 is, but then what IS?
