The chemical processes are the same to add the detergents to the oil. I was using it as an example, airplanes use 1930's tractor technology because tractors were more advanced than automobiles during its infancy. If someone was to have a bad engine, it would either go to the scrap yard or be rebuild without ever being investigated. Its a proven fact that oils do get old and change chemically, but you will still have those who will claim that their oil is good and they will use it anyways.