There are two grades of TSC fluid. The "premium" is recommended for cold weather. I am glad I've never seen -20!
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Travis
1993 Cub Cadet 2064
1988 Cub Cadet 2072
1980 IH Cub Cadet 782 w/CH20
1966 IH Cub Cadet 102 w/K301
1961 IH Cub Cadet O
1967 IH Cub Cadet 102 & 122
JD 2155 w/ 175 loader