December, 1955
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John Deere Service Bulletins

No. 235
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MULTI-VISCOSITY CRANKCASE OILS
(Models "M," "40," and "420" Series Tractors)

The multi-viscosity oil recommendations for the Models "M", "40," and "420" Series of tractors are given in the chart below:

Temperature

Single Viscosity Oil

Multi-Viscosity Oil

Summer

SAE 20

SAE 10W-30

Winter

SAE 10W

SAE 5W-20

During the break-in period of 120 hours on all-fuel tractors and 600 hours on gasoline tractors use SAE 10W or SAE 5W-20 oil.

John Deere Service Bulletin No. 231 gave the multi-viscosity oil recommendations for the "A", "B", "G", "R", "50", "60", "70", and "80" Tractors.