Oil for the twin turbo?

Discussion in 'Engine' started by janner, Aug 25, 2011.

  1. janner

    janner Hardcore MB Enthusiast

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    I need to change the oil in the E320 M104 twin turbo.
    At the moment I'm using Mobil1 0-40 but when it's really hot (eg traffic jams) the oil pressure drops to 1.5 bar. Would I be better off with a different oil?
    I'm thinking Mobil1 15-50 or Castrol Edge 10-60.

    Thoughts?
     
  2. d w124

    d w124 MB Club Veteran

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    I thought that was normal though
     
  3. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    As it is turbocharged I would stick with the Mobil1.
     
  4. OP
    OP
    janner

    janner Hardcore MB Enthusiast

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    0-40 or 15-50 then?

    It really does get hot under there and before the turbos were fitted the oil pressure was always 3bar. Car has done about 70K miles in total (<10k of that with the turbos)
     
  5. developer

    developer MB Club Veteran

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    I'm aware I've missed something here J but can you tell me more about your twin turbo E320 - it sounds very interesting.
     
  6. OP
    OP
    janner

    janner Hardcore MB Enthusiast

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    I converted my E320 coupe with a Hughes kit a couple of years ago.

    [​IMG]
     
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  7. developer

    developer MB Club Veteran

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    What BHP?
     
  8. OP
    OP
    janner

    janner Hardcore MB Enthusiast

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    280bhp and 350ft/lbs.
    It should make a lot more but hey ho that's what the dyno said. I'm sure it overfuels on boost though so with some tinkering I'm sure there's more in there. If I had the inclination I would adjust the fuel map (it's 3d programmable) but I'm happy with it as is.
     
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  9. d w124

    d w124 MB Club Veteran

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    You should be getting at least 320-330,many people that had TT and 500e swear the TT feels faster
     
  10. OP
    OP
    janner

    janner Hardcore MB Enthusiast

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    We've digressed. Oil recommendation please.:)
     
  11. nick.ged

    nick.ged Hardcore MB Enthusiast

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    fit an oil cooler, and keep the same weight oil you have.

    source from diesel 124, or the... in fact has your car already got an oil cooler? if so, fit a bigger rad.
     
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