LOVEMYBS

I recently had my oil changed at my local dealer and didn't think much about it until I started to research what oil to use in my 07 E550 4Matic Sport. My dealer installed 10 qts. of Mobil 1 5W-40 in my BS. BTW, that's the same oil they installed 6K ago at my E550 scheduled Service A. The Mobil 1 site recommends 0W-40 for my E550 not 5W-40 so I was curious if this was also the right oil for my BS. I checked the Mobil 1 website and they specify 5W-30 for the BS. Who's right, AMG or Mobil 1?

thebishman

I have been told by knowledgable owners here that the correct oil is now the Mobil 1 5W-40 ESP Formula M for the 6.2 litre engines. This is the same oil btw MB recommends for the GL 320 CDI that my wife drives.

I had to talk my SA into putting it into my car last week as he still seems to think the car takes 0W-40 Mobil 1.

Bish

Moxxon

Ever since I bought my E63 and had it serviced at the local MB dealer, they have always told me they use 0W-40, so that's what I have always used, including in my C32. I just bought 8 quarts, maybe 9, (I forget since I bought oil several months ago) and will be putting it in soon.

One thing I love about the 6.2 liter engines is that they come with a proper dipstick! My C32 did not have a dipstick and it really annoyed me. Not sure about the other newer models out there besides my beloved E63, but what was MB thinking? Were they just trying to save $1 or $2 per car by not putting a dipstick in my 2003 C32? All this cost cutting is getting ridiculous, especially for cars that cost $50K to $100K+ per automobile. Now I hear that MB is sharing parts with the C-Class and E-Class. Makes me glad that I own a W211.

I'm old school and I like to see the actual color of my oil when I am checking it. Also, one thing I would highly recommend for owners who like to change their own oil is to buy an "oil extractor." I bought a brand made by Pela, but I know there are several brands out there. My SA at the MB dealership even told me they don't drain oil plugs anymore; they use oil extractors. Yeah, it may not get all the dirty oil out of your oil pan, but a tiny amount of dirty oil mixed with 8 quarts of new Mobil One is not going to hurt your engine. I actually think my oil extractor removes more dirty oil than removing the drain plug.

Anyway, I'm staying with 0W-40, even though it can be very hard to find sometimes. The auto parts store I go to is actually across the street from the MB dealer and one of the nice employees at the parts store told me whenever they get several cases of 0W-40 Mobil One in stock, the techs at the dealer walk across the street and buy it all up (not sure if it's for their personal cars or not, but that's what I was told). I figure that the lower viscosity of the oil when the engine is cold simply helps lubricate the engine faster.

DFW01E55

From the private lounge:

Thank you very much for your post. This occurs as the automotive fluid standards have changed in the meantime (in May 2008)

AMG recommends the use of the following oils:

- Mobil 1 5W-40 for M156 engine (63er models)
- Mobil 1 0W-40 all other AMG engines (as well the AMG diesel engines that was used for the C 30 AMG)
- Mobil 1 5W-50 SLR engine

Before that change, the Mobil 1 0W-40 was used for the 63 models as well.
We hope that this information helps.

LOVEMYBS

Thank you, I'll stick with 5W-40 if that's what AMG recommends.

Moxxon

Thank you DFW01E55 for the information. I guess I'll be changing to 5W-40 in the future then, but why did they change? Does AMG think 5W-40 offers some distinct advantage over 0W-40? Seems to me that both oils would work fine, but I wonder why AMG now recommends an oil that is technically thicker when the engine is cold. Seems the thicker oil would disperse slower? Then again, thicker oil protects metal parts better, assuming it has reached all parts of the engine quick enough. Just thinking out loud I guess...

Either way, gotta love the M156!

thebishman

Not always just a question of viscosity; it could be to do with the additive package also.

Bish

gestut

quick question, so if one has 0w-40 in the BS is that bad, because thats what the dealer put in mine....

Jon2007E63P30

Mobil1 0W-40 is the "preferred" approved oil due to the higher level of wear inhibitors.

Stick with that.

If warrantee is gone, then the discussion opens up further. There are other oild which have an excellent reputation. However, Mobil1 is damn good stuff. I plan to stick with it.

P.S. "OMG Another Oil Thread" is certainly appropriate.

gestut

please refer to post # 4, it says mobil 5w-40, what do you put in your CLK black series?

LOVEMYBS

I changed to Motul 5W 40 racing oil and really like it!

_AMG_

Your fine with 0W-40 or 5W-40.

KIWI KEN

If AMG have changed the oil spec from 0W to 5W for the M156 engine there will be a very good reason for that.
There has been a problem with cam and especially cam follower wear in the M156 engine with the original parts having been superceded several times. Using a higher viscosity oil will reduce wear in these parts and also boost the flow from the oil pump.

gestut

is that the 300v power racing oil, ? i looked it up and for our engines it shows up x-cess oil, so is this racing oil beyond all spec? also please expand "you like it"

kent426

5W-40 is a diesel blend with higher detergent levels. My guess would be that AMG's run a little dirty at WOT so the detergents would minimize the carbon buildup. Also, 5w in the cold may help the lifters pump better until the engine is sufficiently warm. Without sufficient hydraulic pressure, you will possible get a little bit of valve slap on the cam.

LOVEMYBS

Yes, Motul meets or exceeds all AMG specs. Not sure what X-Cess means. When I posted "I like it" my engine "seemed" to run quieter and smoother. This may be a little bit of wishful thinking but that was my impression upon restarting with Motul.