Hi,
I have noticed in the F4U-4 that there is an issue with fuel burn.
This was with 100% and a DT not that it changes with other fuel loadouts.
Example at Military power.
GPH = 672
Time remaining 33 mins
Range 110.
And on WEP.
GPH = 564
Time remaining 38 mins
Range 140.
So basically on WEP your GPH reduces, your Time remaining and your range increases.