I have to be honest. I never heard of using mineral spirits. I have heard of people that use kerosene to flush an engine. Anything you pour into the oil fill will drain into the oil pan. However, it will not make its way to the oil pump, oil galleries, and so on.
I have heard of people that drain the oil on old vehicles, top off to the full level with kerosene, start the engine for about 5 seconds, and then drain it. I'm told that really gets everything cleaned out, but I have never done it and can't confirm.
Joe
Wednesday, April 22nd, 2020 AT 9:48 AM