Alberta Farmer - 12/6/2013 00:20 Dad said they used to have a tractor, possibly MF 65, that had some sort of powder or granular weight in the rear tires instead of fluid. Apparently it worked fine in summer, but in the winter it would clump together and the first mile or so was extremely rough. Of course at anything more than 40 below, any tire feels like it is square when you first start out. In answer to your question, with overhead heat, it will take 3 days, 5 hours, 16 minutes and 12 seconds. Approximately.