Hello, does anyone know why you don’t connect an electric preheating with a circulation pump to the oil circuit of a motor? a healthy battery provided, without forgetting that, it is best to use an additional battery only for this purpose. 100ah, you would have to be able to bring the oil to operating temperature in 3-4 minutes, depending on the quantity and outside temperature. you wouldn’t pull more current than many people do. that would be quite significant for the lifetime of the mot ors. doesn’t the car industry want to do that? why have I never heard of someone who has made such a thing together? do I have a mental mistake in it somewhere? the whole thing of course with mobile remote control or something to get away from the waiting time. lg karl