Need some help with oil..

OliverGuy

Well-known Member
There is a new drum nearby that is in an auction. It says it's Countrymark's DEO 30. What is that and what can it be used in. Looks like it had been used in all their tractors I guess. Thanks for the help.
 
I saw it says Diesel engine oil in 30W, but what do you guys use that in? I run rotella or Mobil in all our diesels, this oil just seemed like something different than normal.
 

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