Technical question: Effect of Combat on range

Does anyone have any details on the effects of combat on the range of WWII Aircraft? ie, if say a Japanese Zero has a range of over 1,000 nm, if it gets in a dogfight, roughly how much range would it lose? Or, to give another instance, if a US Avenger Torpedo Bomber has a range of, say just over 1,000 nm, how much range might it lose?

I realise this is not a simple question, since it must depend on what the combat involves and how long it lasts, but if a WWII aircraft is using maximum power for, say, five minutes, roughly what percentage of its fuel is it using? Is there much difference in this between single and multi engine aircraft or between inline and radial engine aircraft?

Thanks

Just an (educated) WAG but from info found in "America´s 100,000" on "combat radius" I think two thirds of a planes fuel is needed for getting to the combat zone and back, while the last third is used up in combat where 5 minutes on war emergency power guzzle as much gas as 15 minutes on military power.

Combat radius for a P-40 was ~300 miles for a Zero over 650 but that meant pushing it.