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Does anyones Diesel oil run golden?

Discussion in 'General Automotive Chat' started by RobMorris, Mar 21, 2013.

  1. RobMorris
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    RobMorris Member

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    [Mar 21, 2013]
    Chaps

    I recently bought a Diesel A4.

    The oil in the engine was like crude oil which I quickly replaced with 5/40 fully syn + filter.
    Although I poured in golden oil it was instantly black and mucky on checking the dip stick..

    3 weeks + 1000 miles later I have just done another oil change.

    I instantly checked the dip stick and it was golden until I drove the car and its black again.

    Have I so much crud in the engine that I need to do a few changes to run golden or being a Diesel engine it just will never run golden!?

    Cheers
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  3. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Mar 21, 2013]
    it always goes black in the diesels
    iv noticed it aswell
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  4. Rom
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    Rom Member

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    [Mar 21, 2013]
    Welcome to diesel's!

    They will only ever run golden when new, or maybe after an extensive rebuild.

    We had a customer bring a Yaris back as it had no oil in. It had plenty, but was new, so was still golden.
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  5. AlexGSi2000
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    AlexGSi2000 Well-Known Member VCDS Map User

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    [Mar 21, 2013]
    When I first got my 2.5TDi (just over a year ago) I changed the oil - like you said it was black within minutes of driving.

    Since then I have carried out 8 oil changes - yes, 8.

    The oil runs golden for about 70 miles now before it turns black.
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  6. RobMorris
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    RobMorris Member

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    [Mar 21, 2013]
    8 changes LOL!

    OK I guess I with have to live with black oil then...

    Thanks!
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  7. ShaunS3
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    ShaunS3 Yorkshire & Humber Rep. Regional Rep

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    [Mar 21, 2013]
    The reason why diesel oil goes black quicker than petrol engines is due to its cleansing properties. It cleans an lubricates the engine, similar to what v-power fuel will do for the fuel system.

    I ran some of this on my old car as a flushing/cleansing oil before putting the good stuff in, plus it was a little thicker and quietened down my noisy tappets :)
    #6
  8. @udi A3
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    @udi A3 Site Sponsor Site Sponsor VCDS Map User

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    [Mar 22, 2013]
    8 oil changes to make the oil run golden?! MADNESS!
    Generally you can feel the clean oil in a desel after a change, but they all go black right away, had a few cusomers complain we hadnt actually changed there oil after services when i worked in a garage. We always offered to change it again in front of them but they would have to pay again when we proved this to be the case!
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  9. _G_
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    _G_ Active Member

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    [Mar 22, 2013]
    the oil is doing its job. just because it has changed colour does not mean it has lost its properties.
    I can put in honey syrup colour oil into my audi a3 2.0 tfsi and even after a good oil flush and extra oil change it will go darker within 100 miles. Not a bad thing. I had it lab tested and it was still good oil... no problems with thermal flash point, no excess acids/break down etc.
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  10. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Mar 22, 2013]
    Goes black almost immediately after you start it up, sounds normal to me.
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