It got up to 47 here yesterday and enough snow had meted to allow the barn doors to open on the mower shed. I fired up the John Deere D140 for the first time in maybe six weeks. It turned right over and fired up. The oil is fresh 15w-40 RT6.
The Predator 3500 generator also tuned over and started easily using the electric started. The oil in that one is 5w-40 RT6.