Yes, another oil thread...
#51
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
#52
That's right - see my post #44 above (https://mbworld.org/forums/5802431-post44.html). Confusion I may haz had it.
#53
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Regards,
Joe
#54
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W204 C63 Coupe, W166 ML350 BlueTEC, 928GT, C5 Z06 & IS300 race cars, EQE 4Matic+ on order
This is what I was trying to explain in my previous post. Unlike software revisions for example, 229.51 is not a later spec of 229.5. 229.51 supersedes 229.31 (oils that were originally approved for diesel engines), whereas 229.5 supersedes 229.3 (oils that were originally approved for gasoline engines).
In the past, 229.5 and 229.51 oils were mutually exclusive - the first was for gasoline and the second for diesel engines only. Recently, MB approved the 229.51 spec for use in their gasoline engines as well, but the 229.5 spec is still better for gasoline engines due to the higher ash content and HTHS values. Mobil 1 0W40 is a 229.5 spec oil whereas Mobil 1 Formula M 5W40 is a 229.51 spec oil.
There is an old thread on this board that discusses this in more detail at https://mbworld.org/forums/c-class-w...il-change.html.
I am not familiar with 229.52 so I can't comment on it, but it's also a low ash formulation so likely better suited to diesels than to gasoline engines. AFAIK the only Mobil 1 oil that meets the 229.5 spec (the "better" one for gasoline engines) and approved for the M156 engine is the 0W40.
Cheers,
Doug
Last edited by Diabolis; 10-07-2013 at 07:42 PM.
#56
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2014 Mercedes-Benz E550 4Matic, 2010 Subaru Legacy 3.6R
I can't speak to the M156 engine, but my owner's manual for the 2014 MB E550 4matic with the M178 V8 allows a variety of oil viscosity combinations. See the chart on page 425 (of my English-language manual, Edition C 2014, Order no. 6515 3576 13, PN 212 585 83 00).
Above 23 degrees Fahrenheit, Mercedes permits the use of 0W-30, 0W-40, 5W-30, 5W-40, 5W-50, 10W-30, 10W-40, 10W-50, 10W-60, 15W-30, 15W-40, 15W-60, 20W-40 and 20W-50, fourteen viscosity combinations in all. There are increased approved-oil viscosity restrictions for colder temperatures.
As to Mercedes-Benz knowing all, I believe they have good but still imperfect knowledge of oils and their usability on M-B engines. Few factory and laboratory tests can perfectly duplicate the diversity of experiences that engines undergo in real life--sometimes over many decades.
I currently wonder why Eneos 0W-50 oil is not Mercedes-Benz 229.5 approved, though a review of Mobil 0W-40 versus Eneos 0W-50 specifications provides some possible hints.
Above 23 degrees Fahrenheit, Mercedes permits the use of 0W-30, 0W-40, 5W-30, 5W-40, 5W-50, 10W-30, 10W-40, 10W-50, 10W-60, 15W-30, 15W-40, 15W-60, 20W-40 and 20W-50, fourteen viscosity combinations in all. There are increased approved-oil viscosity restrictions for colder temperatures.
As to Mercedes-Benz knowing all, I believe they have good but still imperfect knowledge of oils and their usability on M-B engines. Few factory and laboratory tests can perfectly duplicate the diversity of experiences that engines undergo in real life--sometimes over many decades.
I currently wonder why Eneos 0W-50 oil is not Mercedes-Benz 229.5 approved, though a review of Mobil 0W-40 versus Eneos 0W-50 specifications provides some possible hints.
Why would anyone think that they know more about the oil spec requirements of the M156 engine than the Mercedes Benz engineers? They know about every issue. The valve train, the head bolts, everything. They changed from 0-40 to 5-40 for a reason. They specified the 80 deg C requirement for a reason. They specified only 5-40 weight oil for the M156 at 229.51spec for a reason. Why would anyone think they know more about this issue than the MB engineers?
Do your own thing at your own peril and don't ***** about the cost when you pop an engine.
I use Valvoline 5-40 (229.51 spec) and add ZddPlus. ARP studs, SLS buckets, and adhere to the 80deg C. limit religiously in all my M156 Benzes.
Do your own thing at your own peril and don't ***** about the cost when you pop an engine.
I use Valvoline 5-40 (229.51 spec) and add ZddPlus. ARP studs, SLS buckets, and adhere to the 80deg C. limit religiously in all my M156 Benzes.