M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

OIL Bluetec - what and why

Old Jun 2, 2015 | 04:45 PM
  #1  
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OIL Bluetec - what and why

Mercedes always recommended Mobil 1 5W-40 ESP formula. Since Mobil decided that Mercedes customer only is not enough to keep the production going, they decided to switch to Mobil 1 0W-30. I read throughout the forum that this oil is not as good specially for warmer climates and over time engine parts with wear out sooner. I started looking around for what Mercedes recommends and found this list - https://bevo.mercedes-benz.com/bevol...229.51_en.html
Based on this list and what is available I narrowed down to following oils:

Castrol EDGE 5W-40 - Sold at VW dealers
Pento High Performance II 5W-40
PENTOSYNTH HC
Valvoline SYNPower MST 5W-40 Full Synthetic

Has anyone used any of those oils? Any thoughts?
Thanks
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Old Jun 3, 2015 | 07:08 AM
  #2  
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I believe AMS oil makes a 5w40 oil that will meet the specs. Which ever oil you choose it MUST have the ESP (low ash) or some other designation making it safe for diesel emissions.. I dont believe any of the oils you have listed meet the diesel specs. If you search I think there was an analysis done and there is very little difference between the 5w30 and 5w40 at operating temp.
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Old Jun 3, 2015 | 12:56 PM
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2009 ML320 Bluetec
Originally Posted by 06e320cdi
I believe AMS oil makes a 5w40 oil that will meet the specs. Which ever oil you choose it MUST have the ESP (low ash) or some other designation making it safe for diesel emissions.. I dont believe any of the oils you have listed meet the diesel specs. If you search I think there was an analysis done and there is very little difference between the 5w30 and 5w40 at operating temp.
I believe he correctly listed oils from the Bevo 229.51 site, all of which meeting 229.51 are diesel rated.

I disagree with the modern folklore claiming one will experience accelerated wear using a 30 weight oil vs 40 weight. I seriously doubt more than one or two W164's will ever wear out their engines before the doors and wheels fall off.
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Old Jun 3, 2015 | 11:52 PM
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ML 320 CDI
Originally Posted by N4HHE
I believe he correctly listed oils from the Bevo 229.51 site, all of which meeting 229.51 are diesel rated.

I disagree with the modern folklore claiming one will experience accelerated wear using a 30 weight oil vs 40 weight. I seriously doubt more than one or two W164's will ever wear out their engines before the doors and wheels fall off.
+1
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Old Jun 4, 2015 | 08:49 AM
  #5  
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From: Epsom Downs, England
ML 320 W164
You need to check with a VIN search if you actually have a DPF.

If you don't, you can but cheaper oil with a clear concience.
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Old Jun 6, 2015 | 03:29 PM
  #6  
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ML 320 CDI
I havent heard of a w164 diesel without a DPF from the factory. CDI models have DPF only. Bluetec models have DPF plus urea injection for even cleaner emissions. Its easy to spot what a DPF looks like - its like a big muffler with 2 steel pipes before and after it. Don't confuse these pipes from Oxygen sensors which are much bigger. Google what a Ox sensor looks like so you know what NOT to look for.
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Old Jun 9, 2015 | 09:56 AM
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From: Pike Road, AL
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Originally Posted by N4HHE

I disagree with the modern folklore claiming one will experience accelerated wear using a 30 weight oil vs 40 weight. I seriously doubt more than one or two W164's will ever wear out their engines before the doors and wheels fall off.


Depending on what climate the vehicle is operating in, it could actually make the engine last longer.

Not enough to make a difference, probably but in theory...

My guess would be that the transmission on these vehicles will shell out before the engine ever thinks about giving up. Most will be scrapped out at that point.
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Old Jun 9, 2015 | 10:06 AM
  #8  
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From: Madison, AL
2009 ML320 Bluetec
Speaking of 30 vs 40 weight oil:
Originally Posted by 5hundo


Depending on what climate the vehicle is operating in, it could actually make the engine last longer.

Not enough to make a difference, probably but in theory...
Then why don't we use 50 or 60 weight? Say in OTR trucks? And why do we not see modern 20 weight oil engines failing left and right?

Have said before sometime in the late 1980's I read an SAE paper believe to have been written by Ford engineers which turned the understanding of mechanics of lubrication on its ear. Previously unknown mechanisms were at work in the pressurized plain bearings. The authors predicted the coming 20 weight oil, and maybe even thinner.

Mercedes-Benz listed 5W-40 as the first choice for my W164 and I will continue until my current supply is exhausted. Then without a worry will start using 5W-30.

My dirtbike is another story. All caged ball and roller bearings. 50 weight is specified. I'd love to use 15W-40 "diesel" oil but its mechanically louder when I do.
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Old Sep 18, 2015 | 12:50 AM
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formerly drove a 2010 ML350 BLUETEC, currently drive Mazda, Chevrolet, and Toyota
For some reason (probably because of excessive engines failures), and at some point, MBUSA changed the oil specs for Bluetec OM642 engines. 5W-40 is now not recommended in OM642 engines but MB won't reveal why. In April this year, the engine seized in my 2010 ML350 Bluetec @ 82K miles after, we determined, my MB dealer used MOBIL 1 ESP 5W-40 oil at every recommended oil change interval. Coincidence? Please see details in posts this week in my thread, found here: https://mbworld.org/forums/diesel-fo...ne-seized.html
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Old Jan 22, 2020 | 09:49 PM
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ML350 BLUETEC 2012
ML 350 BLUETEC 2012

Hi everyone!
I just bought a Mercedes ML 350 Bluetec (Diesel) 2012.
I want to ship it in my country of origin and was thinking to take some Engine Oil with me from US.
Can anybody recommend me what Brand and type of oil to buy? I mean I see they use 15-30w, 15-40w, 0-40w, etc...and also I don't know the quantity of oil it takes.
I had before a w164 ML350 2007 and I used 10-40w and it usually takes 8 Liters, but never had before a ML Diesel.

Another thing is that as far as I know Mercedes recommends Mobil 1 and I'm ok with that, but maybe anyone of you guys experienced as well other brands and you're happy, so maybe I could save some money, because I'm considering to take some quantity with me and ship it with the car since here overall the oil is cheaper.

Anyways if it is Mobil 1 or other brand I would like to know which Serial Type is more appropriate for it.

Thanks!

Last edited by Joniz84; Jan 22, 2020 at 09:53 PM.
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Old Jan 22, 2020 | 10:49 PM
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[QUOTE=Joniz84;7960929
Anyways if it is Mobil 1 or other brand I would like to know which Serial Type is more appropriate for it.

Thanks![/QUOTE]
VERY specifically (pay attention)

The motor oil for the diesel MUST have Mercedes approval MB229.52 printed on the bottle. Must be 52 not just 229.5 No other numbers on the bottle are of any significance.

You may find some with 229.51, which is ok, but this is essentially an obsolete specification and pretty hard to find. By definition ALL 229.52 oils are xW-30.




Last edited by lkchris; Jan 22, 2020 at 10:54 PM.
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Old Jan 24, 2020 | 08:51 PM
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From Wikipedia, here is the explanation for the switch to xW-30 oil ... which is 229.52 as opposed to 229.51

API CK-4 and FA-4 have been introduced for 2017 model American engines.[17]API CK-4 is backward compatible that means API CK-4 oils are assumed to provide superior performance to oils made to previous categories and could be used without problems in all previous model engines (but see Ford below).

API FA-4 oils are different (that is why API decided to start a new group in addition to API Sx and API Cx). API FA-4 oils are formulated for enhanced fuel economy (presented as reduced greenhouse gas emission). To achieve that, they are SAE xW-30 oils blended to a high temperature high shear viscosity from 2.9 cP to 3.2 cP. They are not suitable for all engines thus their use depends on the decision of each engine manufacturer. They cannot be used with diesel fuel containing more than 15 ppm sulfur.
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Old Jul 15, 2021 | 12:07 PM
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Originally Posted by Joniz84
Hi everyone!
I just bought a Mercedes ML 350 Bluetec (Diesel) 2012.
I want to ship it in my country of origin and was thinking to take some Engine Oil with me from US.
Can anybody recommend me what Brand and type of oil to buy? I mean I see they use 15-30w, 15-40w, 0-40w, etc...and also I don't know the quantity of oil it takes.
I had before a w164 ML350 2007 and I used 10-40w and it usually takes 8 Liters, but never had before a ML Diesel.

Another thing is that as far as I know Mercedes recommends Mobil 1 and I'm ok with that, but maybe anyone of you guys experienced as well other brands and you're happy, so maybe I could save some money, because I'm considering to take some quantity with me and ship it with the car since here overall the oil is cheaper.

Anyways if it is Mobil 1 or other brand I would like to know which Serial Type is more appropriate for it.

Thanks!
Sir, I'd suggested you to use the best: Lubrication Engineers, it's the only oil made in ONLY one factory, it's made buy 100% parafinic base oils, and the best, it's additives there are NOT in any other oil in the whole WORLD.
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Old Jul 29, 2021 | 10:21 AM
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His 2019 RAM Cummins Turbo Diesel Laramie; Her's 2007 ML320 CDI P3; Mine BMW R1200R
I have switched to Penzoil Platinum Euro 5W30
Meets the Mercedes specs.
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