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    Simplicity 7790 oil type

    I recently purchased a 1984 Simplicity 7790 diesel garden tractor. It has a Lombardini 18HP engine. The owners manual calls for 40W oil of CD service class (DS series 3) . I have had no luck finding ANY straight 40W oil. The only straight weight oil I can find is 30W. Can Multi viscosity oils be...
  2. N

    Hello from West Virginia

    Hello to all. I own several "antique" tractors. These are working tractors altho I may consider fixing up one for shows. Simplicity 7790 diesel (currently my mower) , a simplicity 7117 (GTH-L) with a governor problem, an AC 917 parts tractor and a couple of old Bolens tractors. Really enjoy...

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