the moral of the story is to run whatever anti corrosion you are using THROUGH the engine. Immersing the engine does nothing for it. So whether you use after run oil, diesel or kerosene distillates or heavier stuff like any polar molecule containing lube oil (motor oil included), run it through the engine and drain excess. The polar nature of the additives and the doublebonded molecules with paraffinic tails will adhere to the surface and protect it from corrosion. The trick is running through and drain.Anyone submerging engines is looking for trouble because nothing has drained especially the nasty stuff