SL55/63/65/R230 AMG: Engine oil …. but which to choose?
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Super Member
Joined: Feb 2011
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From: Sweden
SL55AMG + SL600 + E320 + A180
Engine oil …. but which to choose?
What oil are you using …. Mobil 1 certainly …. but which one?
Mobil 1 – Peak Life 5W-50 ….. fully synthetic? (old name: Rally Formula) and which oil to use to break-in a renovated engine? …..
Mobil 1 – Peak Life 5W-50 ….. fully synthetic? (old name: Rally Formula) and which oil to use to break-in a renovated engine? …..
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From: Central WI (BFE)
SL55, ML500 & Acura TL
0W40 here too. Although, my SL goes to bed for the long Wisconsin winter and will almost never get started in temps below 50 F. I suspect your SL won't get fired up much in the middle of the Swedish winter either. 
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Thread Starter
Super Member
Joined: Feb 2011
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From: Sweden
SL55AMG + SL600 + E320 + A180
but for oil and all other fluids ..... found this:
http://www.startekinfo.com/StarTek/o...stedDocId=9511
MBWorld Fanatic!
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From: Central WI (BFE)
SL55, ML500 & Acura TL
Ha ha ha Curt ........ not going many RPM right now ...... and you know that .... ha ha ha
but for oil and all other fluids ..... found this:
http://www.startekinfo.com/StarTek/o...stedDocId=9511
but for oil and all other fluids ..... found this:
http://www.startekinfo.com/StarTek/o...stedDocId=9511
Senior Member
Joined: Jan 2009
Posts: 327
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From: Isla Verde, Puerto Rico
SRT-6
I use Mobil 1 0W40 and from what I've seen on Bob's the oil guy forum it seems to be about the best viscosity Mobile makes for street cars. I'm sticking with it unless my UOA comes back with concerns. It's hot year round in my neck of the tropics so a thicker oil may be preferred. I'll know soon.
Les
Les
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From: ATLANTA
R Nine T
I use Mobil 1 0W40 and from what I've seen on Bob's the oil guy forum it seems to be about the best viscosity Mobile makes for street cars. I'm sticking with it unless my UOA comes back with concerns. It's hot year round in my neck of the tropics so a thicker oil may be preferred. I'll know soon.
Les
Les
There is a very detailed oil thread on c63 forum check it out.
Last edited by AMG 17GT; Oct 11, 2013 at 09:35 PM.
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MBWorld Fanatic!
Joined: Dec 2004
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The dealer is supposed to put mobil one 0w40 in your sl65.
Honestly the 5w40 oil is prolly not a problem either, especially in fl, but it is not what the mercedes recommendation is for your car. As a matter of fact the mobil one 5w40 oil is specifically not recommended for your Amg.
Honestly the 5w40 oil is prolly not a problem either, especially in fl, but it is not what the mercedes recommendation is for your car. As a matter of fact the mobil one 5w40 oil is specifically not recommended for your Amg.
Last edited by alx; Oct 13, 2013 at 12:46 PM.
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Joined: Oct 2007
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2017 SL450
This is a very interesting discussion because of the potential wearing of the cams and flat tappets on the M156 SL63 engine. I don't know if the SL55 engine has a similar cam and lifter setup.
I have been told that the official oil recommendation for AMG engines is now 5w-40 Mobil one Formula M non ESP oil and no longer 0w-40 Mobil one Euro formula. Now the question is how much zdp and phosphorus does the 5w-40 formula M have? Does anyone know? I know the 0w-40 has 1000ppm of both zdp and phosphorus.
I believe the 5w-40 recommendation is because it won't drain out of the lifters as easily or quickly.
Since my car is still under warranty I am going to stick with the Mercedes recommendation. If it wasn't I would look for an oil with higher zdp and phosphorus levels. Something like Brad Penn 5w-40.
I have been told that the official oil recommendation for AMG engines is now 5w-40 Mobil one Formula M non ESP oil and no longer 0w-40 Mobil one Euro formula. Now the question is how much zdp and phosphorus does the 5w-40 formula M have? Does anyone know? I know the 0w-40 has 1000ppm of both zdp and phosphorus.
I believe the 5w-40 recommendation is because it won't drain out of the lifters as easily or quickly.
Since my car is still under warranty I am going to stick with the Mercedes recommendation. If it wasn't I would look for an oil with higher zdp and phosphorus levels. Something like Brad Penn 5w-40.
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Joined: Mar 2018
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2005 SL65 AMG
