What does your oil temp run?
#27
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
It is the same MB Spec sheet 229.5 for all C Class with the restriction: Only SAE 0W-40 /SAE 5W-40 engine oils may be used in the C 63 AMG. (2010 Operator's Manual). I think the preferred viscosity may have been updated since then to SAE 5W-40 for the C 63 and MB Spec 229.51 now being allowed as well.
#28
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
It is the same MB Spec sheet 229.5 for all C Class with the restriction: Only SAE 0W-40 /SAE 5W-40 engine oils may be used in the C 63 AMG. (2010 Operator's Manual). I think the preferred viscosity may have been updated since then to SAE 5W-40 for the C 63 and MB Spec 229.51 now being allowed as well.
The viscosity of the oil is a different subject, and every single AMG engine that I know of requires a 40-weight oil (SAE ?W-40) as the 30-weight is too thin to provide adequate protection at high stress/load and operating temperatures of the AMG engines. The cold viscosity (0W or 5W) is achieved by the addition of viscosity modifiers to the base stock so that it flows more easily at low temperatures.
The table below was published by Mercedes-Benz in November 2008, with the required Mercedes-Benz approval number for the different engines:
Engine Type MB Approval Number Approved Oil Viscosity Range
113 229.5 0W-30, 0W-40, 5W-30, 5W-40
155 SLR 229.3 5W-50
156 229.5* or 229.51 0W-40, 5W-40
272 229.5 0W-30, 0W-40, 5W-30, 5W-40
273 229.5 0W-30, 0W-40, 5W-30, 5W-40
275 229.5 0W-30, 0W-40, 5W-30, 5W-40
642 229.51 0W-30, 0W-40, 5W-30, 5W-40
*156 engine using 229.5 should use only SAE 0W-40 oil
The interesting thing to note is the footnote for the M156 engine, which leads me to believe that there may be some other differences between the 229.5 and 229.51 oils, namely that the 229.51 oils flow more easily at low temperatures than the 229.5 oils of the same viscosity. Hence, MB started using the 5W40, MB 229.51 spec oil - made for them by Exxon as Mobil 1 Formula M ESP 5W40 - as standard fill for the M156 engine cars.
So, the C63 with its M156 engine requires 0W40 oil that meets the MB 229.5 standard, *OR* 5W40 oil that meets MB 229.51, which is now the factory fill (Mobil 1 Formula M ESP 5W40). As this oil is only available through the MB dealerships, the obvious choice for those not servicing their cars at the dealer is Mobil 1 0W40, while the dealer will use Mobil 1 Formula M ESP 5W40.
Last edited by Diabolis; 06-19-2013 at 02:04 PM.
#29
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
Table didn't paste properly - here is the actual screen capture.
Last edited by Diabolis; 06-19-2013 at 02:07 PM.