That wasn't oil vapors, that was water...
I'd like to be able to burn off used motor oil in a diesel generator and make use of its energy content. I don't want to send it through the injection pump because then I have to clean it, so my answer is to cover the exhaust pipe with a shroud and then drip oil onto it and suck the oil vapors into the air intake of the engine to be burned with the diesel...
I just like the concept that you can put basically anything that's somewhat liquid-ish and has the potential to burn. Waste vegetable oil with chunks of french fries in it, sure. Used motor oil with metal chips, no problem...