I was thinking of doing this as I keep my tractor in my outbuilding until the first snowfall, then try to bring it in to my heated shop when I can once the snow falls. When its real cold it often sounds on start up like it could use a heater to get the oil flowing quicker. I was just gonna get one at a place like Napa and give it a try to see if it made any difference in the clicking the motor makes on start up when its really cold here.