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  1. #1
    Silver Member MoreCowbell's Avatar
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    Jun 2010
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    121
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    Clayton, NC
    Tractor
    Kubota BX2350

    Default Oil darkening after 25 hours?

    I was checking the motor oil on my BX2350 today and noticed that the oil, while not comletely black, is still rather dark. Definitely not the clear appearance that new motor oil has. The tractor only has 25 hours on it. Is this normal for being half-way through the oil's service life? Maybe I'm thinking to much in terms of a gas engine where the oil is still clean looking half-way though an oil change cycle. Thanks.

  2. #2
    Super Member texasjohn's Avatar
    Join Date
    Oct 2005
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    5,392
    Location
    Central Texas, Jarrell
    Tractor
    Kubota 5030HSTC

    Default Re: Oil darkening after 25 hours?

    I'm surprised it's not completely black...diesel does that to oil. What you are seeing is normal.
    Joy is having the tools you need and needing the tools you have!

    Kubota 5030 HSTC, BB, Danueser PHD, LA853 QA HD FEL w JD toothbar, 3pt chisel, 3 pt disk, 6' shredder, Kubota FEL hay spike, 3pt hay fork w carryall, Kubota RTV 1140

  3. #3
    Veteran Member jlsmith's Avatar
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    Aug 2010
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    1,263
    Location
    Murchison, Tx.
    Tractor
    MF 285 Long 560 MF2670 CX100

    Default Re: Oil darkening after 25 hours?

    Your still in the break in phase. Dont worry to much remember its a desiel and will b a little darker as you use it

  4. #4
    Platinum Member
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    Jul 2003
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    594
    Location
    mid-south idaho
    Tractor
    Kuota L3130, Ford 9-n, Allis AC, and a JD 4020 with powershift

    Default Re: Oil darkening after 25 hours?

    what both of these folk said ^^^^^^^
    Live Right
    Till the soil
    'till I am soil

  5. #5
    Veteran Member DiezNutz's Avatar
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    May 2006
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    1,019
    Location
    Central MD
    Tractor
    Kubota B3030-HSD-F

    Default Re: Oil darkening after 25 hours?

    It will be as black as tar by the time you're ready for an oil change. Combination of soot and detergents in the oil. Looking dirty and being dirty are not necessarily the same thing.
    All perfectly normal. Not to worry.
    Welcome to Diesel ownership.
    Kubota B3030-HSD w/R4s, LA403 60" FEL w/ATI TB, RCK60" MMM, Woods BH80-X 4pt Hoe w/24"+12" bkts & Thumb, Woods RB72" Blade w/shoes

  6. #6
    Silver Member MoreCowbell's Avatar
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    Jun 2010
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    121
    Location
    Clayton, NC
    Tractor
    Kubota BX2350

    Default Re: Oil darkening after 25 hours?

    Thanks everyone. I guess I'm in good shape. As DiezNutz said, "Welcome to diesel ownership." Thanks.

  7. #7
    Elite Member timswi's Avatar
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    Nov 2008
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    4,892
    Location
    Beaver County Pa
    Tractor
    Kubota BX23 & RTV1100

    Default Re: Oil darkening after 25 hours?

    Quote Originally Posted by MoreCowbell View Post
    Thanks everyone. I guess I'm in good shape. As DiezNutz said, "Welcome to diesel ownership." Thanks.
    If you get the oil on your hands, you'll notice that it is harder to remove compared to a gas engine...As you said..Welcome to diesels
    BX23TLB & RTV1100 with 72" Power Angle Plow

  8. #8
    Veteran Member easygo's Avatar
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    Mar 2007
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    1,402
    Location
    Eddington, Maine
    Tractor
    Kubota B7800

    Default Re: Oil darkening after 25 hours?

    Oh yes I went running to a mechanic friend with the same question a few years back. I just changed the oil and within the first 10 or so hours the oil was very dark. He calmed me down by saying the same thing.
    It's the going that counts not the distance!

  9. #9
    Silver Member Rebel's Avatar
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    Sep 2007
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    113
    Location
    Wyoming High Plains

    Default Re: Oil darkening after 25 hours?

    A good diesel oil keep the soot suspended in the oil rather than letting it settle out. Your oil is doing its job
    2007 L3240HSTC Fully Loaded, Top-n-Tilt, LA724 FEL, Bobcat Style Quick Attach Bucket and Forks, LandPride 66" Box Scraper With Hydralic Rippers.

    Tow Vehicle; 1997 4X4 Dodge 12 Valve Cummins, 542 HP and 1200+ FT-Lbs.

    2006 KTM 525 EXC, Woods Single Track Attack Machine

  10. #10
    Veteran Member DiezNutz's Avatar
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    May 2006
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    1,019
    Location
    Central MD
    Tractor
    Kubota B3030-HSD-F

    Default Re: Oil darkening after 25 hours?

    Quote Originally Posted by timswi View Post
    If you get the oil on your hands, you'll notice that it is harder to remove compared to a gas engine...As you said..Welcome to diesels
    True, but have you ever rebuilt a Diesel engine? The first time I did, I was amazed at how easily everything cleaned up. Pistons, valves, head, etc... all that black stuff practically wipes clean! As opposed to every gas engine I've ever rebuilt, where all the crud is baked on and you almost need a jackhammer to chip it off.

    Just another reason I love these little rattle traps.
    Kubota B3030-HSD w/R4s, LA403 60" FEL w/ATI TB, RCK60" MMM, Woods BH80-X 4pt Hoe w/24"+12" bkts & Thumb, Woods RB72" Blade w/shoes

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