Hi, can you be a bit more explicit? I presume that this is also Diplomacy Remastered? Where are you trying to change the name? On the unit it's self in the unit info window, where it says "Click to change name of unit", or the TOE button on the tool bar, where it says "click to change the model of this unit"? Note that with a TOE assigned you can only change the short name in the TOE window. It might be best to send me a save game with explicit instructions on what causes the problem, which I also presume is a CTD.
One man alone can be pretty dumb sometimes, but for real bona fide stupidity, there ain't nothin' can beat teamwork -- Edward Abbey
I'll need your example, as I did a test, and didn't see excessive oil use for both a paradrop and air transport. Often bugs, or strange things, are due to the exact thing you are doing so I need to check the exact conditions. And you should check the fuel used by your air transports as well.
That said, while checking I did uncover a bug in the paradrop system that would allow you to select a paratroop unit that you can't actually paradrop. The weights for paradrops are done so that a unit must be able to be carried in total by an air transport unit. For example, if you have a paratroop unit with 3 paratroopers with weight 20 and your air transports have carry capacity of 30. You still need 3 transports as the 10 carry points left over from 2 transports can't be combined to carry the 3rd paratrooper. The check to allow you to select the unit will be changed to make this consistent.
One man alone can be pretty dumb sometimes, but for real bona fide stupidity, there ain't nothin' can beat teamwork -- Edward Abbey