M104 engine - fully synthetic oil?

Discussion in 'Parts, Maintenance & Servicing' started by MD5, Jun 30, 2015.

  1. MD5

    MD5 Hardcore MB Enthusiast

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    I've just had my 1994 E320 serviced at the MD, and on double checking my bill, they have charged £113.31 for 7 litres of "Mercedes" oil, which is a 5w30 fully synthetic oil, and makes Mobil look cheap.

    I've phoned them up to query the price, but more importantly, the usage of fully synthetic oil in an older engine (M104, covered 58k miles), and I'm waiting for a call back from them.

    Does anyone know about this usage please, as I thought it was not advisable?
     
  2. John Jones Jr

    John Jones Jr Hardcore MB Enthusiast

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    From what I recall it should be 10w/40 semi syn.
     
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  3. grober

    grober MB Club Veteran

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    Unlikely to do any harm in this climate ---should stay in grade for longer meaning you can extend that next oil change interval a bit---- 10w40 semisynthetic would have been the specified oil when the car was manufactured so really a best practice rather than essential specification scenario. It was probably what they had on the premises as the oil most suitable for most of the cars they service in the shape of a 55 gallon drum out back. Next time might be an idea to supply your own oil.
    ps there is no " Mercedes Oil" as such just oil from certain manufacturers they buy in and label as their own ------ In the days of the M104 it would have almost certainly been supplied by FUCHS now perhaps Petronas, or Mobil for certain AMG models
     
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  4. WDB124066

    WDB124066 MB Club Veteran

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    I asked Daimler & Mobil here the exact same question, answer was no problem at all Sir, car has done 147,000 miles on Mobil 1 only from new and still going strong.

    You can call the Mobil hot line and ask directly the exact grade, from memory 5W40 for the M104.
     
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  5. OP
    OP
    MD5

    MD5 Hardcore MB Enthusiast

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    Thanks John/Graeme.

    They've just phoned back giving a couple of oil options, but with no qualms over what they have used, as you say, Graeme. I remember Olly at PCS saying that f/s oil wasn't recommended though. Whilst I appreciate they don't have their own oil, they've listed it as such, where they normally specify Mobil when used.

    I'll be bringing my own next time, for sure!
     
  6. WDB124066

    WDB124066 MB Club Veteran

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  7. ray_hennig

    ray_hennig Hardcore MB Enthusiast

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    My 300CE-24 was on fully synthetic 5w/40 when I bought it from MB in 1997. It's been on that ever since and, at 1/4 million miles all seems well.

    RayH
     
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