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  1. #1
    Bronze Member
    Join Date
    May 2007
    Posts
    68
    Location
    Cranberry Twp., Pa
    Tractor
    198? Satoh Buck S470d

    Default Oil color?

    Anyone else notice that after a fresh oil change, that the new motor oil turns ashy black on the dipstick within a couple hours of operation?

    Is that normal? My dad says his MT250d does exactly the same thing...

    I use rotella oil, and a new oil filter when I change the oil on my S470d.
    It's my first diesel tractor, so I wasn't sure if that was normal or what. Seems to run fine. I don't think it uses any oil.
    198? S470D Satoh Buck

  2. #2
    Gold Member
    Join Date
    May 2007
    Posts
    471

    Default Re: Oil color?

    dont know if it is normal but my 1850 does that. the oil gets black very quickly.

  3. #3
    Gold Member BTackett's Avatar
    Join Date
    Jan 2008
    Posts
    283
    Location
    Knoxville, Tn

    Default Re: Oil color?

    Does the same on my MT372. I also had a Dodge with Cummins diesel and it did the same thing. Must be normal.

    Bill

  4. #4
    Elite Member
    Join Date
    Oct 2006
    Posts
    3,664
    Location
    Ohio
    Tractor
    GC2310,

    Default Re: Oil color?

    Yes, this is normal for a diesel engine. That is carbon blow by from the pistons. The oil is designed to keep it suspended. Thus, it turns black. This is why it is important to use an oil that is designed for a diesel engine. Diesel oil has an ability to hold more of this ash than conventional oil.

  5. #5
    Bronze Member
    Join Date
    May 2007
    Posts
    68
    Location
    Cranberry Twp., Pa
    Tractor
    198? Satoh Buck S470d

    Default Re: Oil color?

    Good to know!!! Thanks!!!
    198? S470D Satoh Buck

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