This is another balancing factor; the Axis was always running out of fuel while the Allies had a surplus. This was a huge factor towards the end of the war as the Axis had intact aircraft and crews but no fuel to keep them in the air. Since A&A doesn’t feature fuel it doesn’t count,
AA does represent this by SBR the loss of income from SBR is your shortage and the loss of territories to an increasing degree limiting German buys.
I have fuel centers in most of my games with different rules covering them, also depending on the level that the game is abstracting.
Lost allied colonies:
uk lost colonies 14.4 ( includes Burma, Borneo, Hong Kong,Malaya)
us colonies 23.9 (Philippines)
french 10.9 (French indo china and some very minor payments from Vichy france to Germany)
British can draw up to 284.0 from her colonies ( Canada, India, Australia) not including those occupied by Japanese and not to the total degree of that number those colonies had their own concerns so the 284 is not a realistic figure… probably realistically 150 is possible.