Finally got all the oil & air filters so I could fire up the compressor... I was concerned about the environment it came out of especially that it may have been overheated so the oil turns to varnish and plugs the oil cooler. Seems to be OK: https://m.youtube.com/watch?v=mFeuywK35lE

The thermal image shows (what appears to be) hot oil going through the cooler and coming out... cooler.

It's not much to watch, the rest of the plumbing won't be here until Monday so I'm working on other stuff. Still, it's hard for me to picture 2 liters per second of almost pure oxygen coming out 24/7.