I could see, literally, the oil drain discharge moving rapidly down the line away from the engine. But I did not observe it at all the various RPM settings. That is why I was surprised to see the outflow of drainage after the engine ran out of fuel. I had thought, based on seeing it sucked out through the silicone line and the copious amount of exhaust smoke it created, that it was effectively evacuating the crankcase.

It's all very interesting, anyway.