Supply Examples, PzC User Manual, p.113-114

[Fortynslow]

I kind of just translate all of that into "Make sure all your motorized units and headquarters are in command range at midnight." I think if you do that, most of your units will will end up getting fuel, and if you don't, they will mostly be out of luck. I typically forget to think about this until the first night turn and then realize there is 60% night disruption preventing me from moving that one hex necessary to get back into command range.

While we are on the subject of fuel, it seems like there ought to be a "No Fuel" status in the game which would prevent motorized units from expending any movement points to move. If a "low fuel" unit failed their fuel check again and was out of command range perhaps, they would be marked thusly. The idea that units can just keep moving with half their movement points all over the map forever does not seem to agree with my reading of WW2 history (or common sense). It seems like there were a lot of historical situations where mobile units simply ran out of fuel and couldn't proceed. I think this would improve larger campaign games in particular where sides with supply issues are able to continue to attack in ways that are ahistorical.