Yeah barracks rules are way different these days.
Anyway, I found this thread oddly enough while searching for a way to legally dispose of oil/fluids. The car I had before the XJ was something I let the dealer do all service on.
Now with the XJ, I want to do all the fluids, and I just regeared, so I need to change gear juice.
I remember a long time ago seeing these catch boxes with dry sweep in them, but haven't been able to find them. I suppose you'd have to take them somewhere for disposal? Back home we just poured used fluids in a big drum and soaked fence posts in them. Anyway.
To chime in, in my "upscale" apartment garage, a lady first honked her benzo horn at me when I was under the jeep starting to remove the bumper. Then I guess she's the one who told on me. My solution -- I'm going to try it anyway -- is to drive the XJ to the top of the garage (roof) where no residents ever go. Plus I'm pretty tight with the maintenance guys, so if someone reports me, they'll blow it off and tell me later.