I agree with elmerfud and h2odragon that things like this could be done in a pinch of nothing else was available and one had an urgent need to use the vehicle.

I agree with elmerfud and h2odragon that things like this could be done in a pinch of nothing else was available and one had an urgent need to use the vehicle. Before making expensive mistakes I would first have someone like ProjectFarm [1] put different oils to the test, or alternatively do the same tests he does to rule out any bias. If doing the test then one would need to send off the oils to a lab after they are put to the test the same as ProjectFarm does. [1] - https://www.youtube.com/@ProjectFarm/search?query=oil https://www.youtube.com/@ProjectFarm/search?query=oil