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AMG Oil query resolved by lostkiwi :-)

Discussion in 'AMG' started by badger_wazzala, Jun 17, 2020.

  1. OP
    badger_wazzala

    badger_wazzala Senior Member

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    Your Mercedes:
    GLC63 AMG
    It's the semi-synthetic I've been advised to use John, the Helix HX7 5W40. It's very hard work trying to find a semi of the correct viscosity. My owners manual state 5W40 or 0W40 for the AMG engine, it's just the Shell is 229.3 not 229.5
    I would think that the main difference is the 229.3 would break down quicker and is predominatly for short-life servicing. It'll only be in the engine for 1200miles.
    I'm not convinced the MB service lad I spoke to on the phone (not a tech purely a phone operator) had sufficient knowledge on the oil types to use. He said the running in was just gentle driving for a thousand miles and then either one-year or 15000 miles for the first oil change and straight to fully-synthetic. I'm at the age were I have life-experience and as such know loads of guys in the industry/track-day-junkies/tuners etc and they 'all' advise me to run the engine in slowly with fresh regular fluid changes to reap the benefits. It's conflicting as MB should know best, but I feel they wouldn't really care either way as the problems would be outside warranty. I guess most people wouldn't really care and say oil was oil but I'm 'different' on many levels. My Wife always says I'm special :-D

    Is there any software that gives info on service interval consumables, or is this included on xentry?
     
    Last edited: Jun 18, 2020
  2. LostKiwi

    LostKiwi Senior Member

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    All 229.5 is synthetic.
     
  3. OP
    badger_wazzala

    badger_wazzala Senior Member

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    Your Mercedes:
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    So wouldn't that mean the semi/mineral oil would break down/turn black quicker than 229.5?
    It's a mine field for me this.
    First engine I've ran-in and the car will be a 'keeper' so I want to treat it kindly. I'd lose tens of thousands if I ever sold it so I intend to enjoy this until it has holes in the floor.
    Same goes for my Disco4.
     
  4. John Laidlaw

    John Laidlaw Senior Member

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    You are right, there is some very conflicting information from MB. As above 229.5 is fully synthetic- Shell Helix Ultra meets 229.5, and as you say the HX7 5W40 (with some mineral oil content) is 229.3, and has a higher relative kinematic viscosity @100oC, even higher obviously at 40oC. To me this means in 'running in' you will have a higher resistance to oil movement, so I guess their theory is the oil will stay put longer for protection in that period.
    I think it's all very marginal personally, I've visited Affalterbach and they bench test with no oil, so go figure!
    I'm not promoting Shell by the way, just that you have some and I've a little insight having visited many of their lube oil plants worldwide (some are very aged now)
    I would agree with the gentle run in on high performance engines, you reap what you sow...
    Edit : having thought about it more commercially could the advice to use semi synthetic during run in just be simply as it's cheaper, therefore doesn't matter so much that you throw it away?
     
    Last edited: Jun 18, 2020
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  5. peterws1957

    peterws1957 Senior Member

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    I must admit that this whole oil thing leaves me totally discombobulated.
     
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  6. Wighty

    Wighty Senior Member

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    It’s easy , for petrol buy 229.5 spec in 20L MB tubs
    for diesel buy 229.51 spec in 20L MB tubs , £60 ish delivered from eBay . Job done :D
     
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  7. peterws1957

    peterws1957 Senior Member

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    That's ok for MB's - it's the rest of our stuff that's hard to fathom.
     
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  8. LostKiwi

    LostKiwi Senior Member

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    If it's good enough for Mercedes.... ;)
     
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  9. LostKiwi

    LostKiwi Senior Member

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    Not quite right Wighty... Corrected above.
     
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  10. peterws1957

    peterws1957 Senior Member

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    Too good for 60 year old V8s and clapped out Zafiras though.
     
  11. Wighty

    Wighty Senior Member

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    I know that buddy , you told me before and I used some .51 in the petrol for extra cleaning power :D . But let’s not confuse the masses :rolleyes: , it’s hard enough for them as it is :p
     
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  12. OP
    badger_wazzala

    badger_wazzala Senior Member

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    So my car has just 1130 miles on it and I wanted to drop the oil now I'm content the engine is run in, and carefully too. Mercedes service department said this isn't necessary and the oil could be left until either 12-months or 15,000 miles had passed.
    I'm glad I trusted my own judgement as my oil was spent, black! The filter was also quite ratty looking. There were only trace amounts of any metal specs in the folds of the paper filter, and one small shear of shiny metal.
    IMG_1684.jpg IMG_1686.jpg
     

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