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Thread: 2010 XK engine oil

  1. #11
    Senior Member M100 TWO's Avatar
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    Because they want you to go to the dealer because of contracts with jaguar. Glad you got sorted Broughtons are a pleasure to deal with.

    John

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  3. #12
    Senior Member MarkyM's Avatar
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    Be nice to have a thread to the actual product:

    https://www.opieoils.co.uk/p-194589-...ngine-oil.aspx

    Weirdly my specialist (Swallows) used the correct oil and charged me £12+VAT per liter at last service, at that price hardly worth buying and/or doing myself
    2014 XK Dynamic R Coupe
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  4. #13
    Senior Member Neilr's Avatar
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    There is another train of though that would suggest that the original Ford WSS-M2C925-A Oil was the spec. used during the design of the 5.0 engine and is the most suitable for that engine. Later oils have been formulated to suit a wider range of newer engines, especially with a view to reducing frictional losses. It is impossible to tell from the outside which way oil development went. Is the newer oil really better than the older for the older engines? Castrol claims it is thinner but stronger, so one would hope that it is fine but it is still different to the original oil.

    We have 3 specs that can be applied to our engines:

    Ford WSS-M2C925-A
    STJLR.51.5122
    STJLR.03.5006

    It would be good to know the real practical differences between them. Without that information, it is just not possible to know if any one choice is better than the others.
    S-Type 3.0 Manual MY2001 in Pacific Blue with Cashmere Leather Sport Seats, Sunroof, Melbourne Alloys, Premium Sound plus some other stuff ... 55k miles.
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  5. #14
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    Quote Originally Posted by Neilr View Post
    We have 3 specs that can be applied to our engines:

    Ford WSS-M2C925-A
    ST.JLR.51.5122
    ST.JLR.03.5006

    It would be good to know the real practical differences between them. Without that information, it is just not possible to know if any one choice is better than the others.
    It would be wonderful. But this seems to be precisely the information that neither JLR nor the oil companies want us to have. The MSDS for most oils gives very little hard information, and as far as I'm aware even the JLR specifications themselves aren't in the public domain.
    John

    01 XJ8 4.0
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    11 XK Portfolio 5.0

  6. #15
    Senior Member 8bit's Avatar
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    Quote Originally Posted by MarkyM View Post
    Be nice to have a thread to the actual product:

    https://www.opieoils.co.uk/p-194589-...ngine-oil.aspx

    Weirdly my specialist (Swallows) used the correct oil and charged me £12+VAT per liter at last service, at that price hardly worth buying and/or doing myself
    Dreadfully sorry for the oversight. Who died and made you Forum Standards Officer anyway?
    Current: 2009 XKR 5.0
    Previous: 2008 XKR 4.2

    I take photos of cars! Find me on Facebook, Instagram and Flickr.

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  8. #16
    Senior Member MarkyM's Avatar
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    Quote Originally Posted by 8bit View Post
    Dreadfully sorry for the oversight. Who died and made you Forum Standards Officer anyway?
    Apology accepted.

    Having I brain the size of a small planet I did that all by myself!

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  9. #17
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    Just to chip in on this as I had a oil change service at a main dealer today.

    2011 XK 5.0

    They used 5W-20 Castrol Edge Professional which agrees with the User Manual for the vehicle

    (last year a different main dealer used 0W-20)

    As below I don't think 0W or 5W makes much difference in the UK but I am happy my dealer used what the handbook says.

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  11. #18
    Senior Member 8bit's Avatar
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    It's not so much for the weight necessarily (although I'm given to understand that the change to 0W from 5W was to do the camchain tensioners), the spec of oil relating to its' other properties has evolved since the manual was printed. The dealer network should all be supplying and using the oil given in the SCN document I linked to earlier.
    Current: 2009 XKR 5.0
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  12. #19
    Senior Member payno's Avatar
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    Quote Originally Posted by 8bit View Post
    It's not so much for the weight necessarily (although I'm given to understand that the change to 0W from 5W was to do the camchain tensioners), the spec of oil relating to its' other properties has evolved since the manual was printed. The dealer network should all be supplying and using the oil given in the SCN document I linked to earlier.
    BMW changed from 5w to 0w for the simple reason to stream line ordering from there oil suppliers as you could easily use 0w anywhere in the world but 5w is still able to be used in temperate countries if needed I suspect Jaguar are benefiting from the same savings as they say every little helps
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