Oil & Fuel JD 4020

/ JD 4020 #3  
Engine JD plus-50 15W-40,Shell Rotella or Delo-400. Any good diesel engine oil

Trans/hyd oil Hy-Gard or a good quality hyd oil that meets it's spec's for wet clutch/brakes
 
/ JD 4020 #6  
-6C is 21 degrees Farenheit...not too cold.
I suggest you go with Tx Jim's recommendations.
 

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