motor oil

   / motor oil #11  
Understood, but I believe you'll find they have contaminates in the oil. Modern diesels have a crankcase breather system that dumps into the intake.
 
   / motor oil #12  
On all of my old tractor.. I'm sure many of them started life on ND oil. I have moved all to HD oil. I did it with short change intervals.. and extra filter changes.

Cheapest for me was to hit wallmart and buy lots of cheap 30w oil.. change it.. run it a few hours.. as soon as oil darkens on the stick.. change it and filter.

My JD B took ? 4 or 5 changes over a period of a few weeks to get it to run with clean oil...

Soundguy
 

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