ORIGINAL: sajm0n
From manual:
Oil Maintenance – All units require oil to keep them in. If no oil is available for an oil unit, the units do not get the base recovery for effectiveness but do get the supply level and headquarters effectiveness recovery.
For land, air, and naval units in port, 1 oil stockpile of maintenance is used for every 3 units/naval groups on the map.
No idea why your production is only 17 though.
This is one of the areas I am confused on. The manual also says if your ships are in a level 9 port the 3 Units/naval use doesn't apply. So I put all my ships in level 9 ports. No change in that upkeep number.
Other type units I am not sure of. Based on the WarPlan (Europe) the upkeep would go to 0 if you didn't move your units. So far Pacific looks like it has some kind of base consumption which I can't seem to find a factor for.

