Wow,
Now that you mention it, yeah, your WW2 map is realy awesome. The time and effort you've putten in models, instead of using those crappy marine and rifleman models >_> etc., is outstanding. Keep it up!! I definitely would like to see this map fiinshed.
Hmm, about the vehicle fueling system, perhaps you should also add some Support Trucks, like fueling truck, it could have it's own additional bar, which would represent how much fuel it has(in cistern tank) for others. After completely fueling some vehicles, it would need to go, for example, to a town and refuel itself and it's cistern tank, so it could go to the battlefield and refuel more vehicles. Well that's my suggestion, though I think it would be complicated to make it. (It would probobly refuel units in X radius).