I also use my Cub Cadet w/K46 to plow snow in the winter,
Mobil1 0W-40 has worked fine, very smooth even in below freezing weather.
(summer temps here are in the 65-85°F range so not that hot)
If I only ran the tractor in warm/hot weather I'd likely use Mobil1 15W-50 instead.
Last edited by mlatour; 05/23/16 06:10 AM.