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Break-in oil?

Discussion in 'XJ Technical Chat' started by Matt Rain, Sep 20, 2017.

  1. Matt Rain

    Matt Rain Member

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    So I've now put 200 miles or so on my rebuilt '89 Radian engine, taking care to vary RPM and avoid lugging the engine.

    While shopping for a new clutch cable today, I noticed that Maxima is selling a "Break-in oil", 10W30 in weight? Should I consider using that or is it too late?

    https://fortnine.ca/en/maxima-performance-break-in-oil

    Also... what's a break-in oil?

    (For the record, I'm using Rotella T 15W40 right now.)
     
    Matt Rain, Sep 20, 2017
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  2. Jetfixer

    Jetfixer Well-Known Member

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    Generally break in oil has a higher zinc content that regular oil. Your probably ok as is , I used this on one of my VW engines did not notice a bit of difference .
     
    Jetfixer, Sep 20, 2017
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  3. cgutz

    cgutz Well-Known Member

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    When I bought my 83 XJ550 brand new, I'm sure it just had the spec oil from the factory. I do recall the dealer had me change it at a shorter interval the first time, and to vary speeds for the first 1k as you doing.

    Currently, I use the same Rotella you are using.
     
    cgutz, Sep 20, 2017
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    XJ550H, Sep 21, 2017
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  5. Matt Rain

    Matt Rain Member

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    Interesting, thanks. This is being sold by a motorcycle-specific online shop, weird.

    Ima stay put and just refill her with Rotella at the next change.
     
    Matt Rain, Sep 21, 2017
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  6. Oldmansin

    Oldmansin Member

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    All, I repeat ALL engines leave fine metal particles in the oil after being rebuilt. No matter the oil used, that's why the short change period on the initial oil. On cars I always used cheap oil that was in spec for initial startup, let the engine idle for about twenty minutes then changed the oil and filter. I would cut open the filter to inspect the metal to make sure it wasn't major, then change it again after about 200 miles with good oil after. If you have a spin on filter putting a strong magnet on the filter for initial is a good idea.
     
    Oldmansin, Sep 21, 2017
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