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I had close to 100k on my 08 gl320cdi using Mobil1 15w40, which I probably would have stuck with had Mercedes not changed their recommendations for better fuel economy on newer models. I chose to find other brands and eventually settled on liqui moly because I wanted to stick with the 5w40 weight. It is my contention that the om642 engines would be better protected with the original heavier weight oil in hotter climates. I am in louisiana so I feel better running a thicker oil esp since I don’t really baby my vehicle
What is interesting for me is the fact that I always wanted 5w30 or even heavier oil but dealer insisted on 0w30. I couldn't even get 5w30 for my OM642.
I guess mb changed their mind?
list price in Ontario is $13.95/L.
Last edited by GoodByeHonda; Oct 21, 2018 at 12:13 AM.
MB 229.51 5W-40 has been superseded/replaced by MB229.52 5W-30
That should, I believe, be MB229.52 0W30.
I don't know if there are differences other than low temp viscosity. Ash is same (0.8) Dealers are now using MB229.52 for all engines with DPF. (Bluetecs). It could have something to do with resistance to the high regeneration temperatures.
I bought 7 liters of Mobil 1 ESP X1 0W30 today at NAPA Canada. Their site says it is $9/L. Store said $12.35, but then sold it to for $8.86/L - Apparently on sale? They also had DEF for $9.95 for 9.46L.
DEF cost like $2 at truck stop pumps and you know it is going to be fresh on.
DEF has pretty limited shelf life and buying one from brick places makes you wonder how old is it.
I am using MB229.52 oils on all my MB diesels and I prefer German brands. That turns to be a hassle, becouse every few months the stock changes and the oil I used before is no longer available.
Not that I fuzz with it too much. Motul, Liqui Moly, - I buy one of them
I would be more concerned about letting the DEF freeze if car is not used for a few days here in Canada. It does, like water, expand when it freezes. They may think they designed the feed system to handle that, but so are our houses, and we still get frozen water pipes that split open.
Re Storage:
From Cummins:
Q. What is the shelf life of DEF? A. The shelf life of DEF is a function of ambient storage temperature. DEF will degrade over time depending on temperature and exposure to sun light. Expectations for shelf life as defined by ISO Spec 22241-3 are the minimum expectations for shelf life when stored at constant temperatures. If stored between 10 and 90 deg F, shelf life will easily be one year. If the maximum temperature does not exceed approximately 75 deg F for an extended period of time, the shelf life will be two years.
Hello and how are you all. I have a 2011 E350 blutec. I bought the car with 48k miles on it, did an oil change immediately as there were no maintenance records with it. I had the car in last week to get the 80k service done , and had a lengthy discussion with my mechanic . He was a former MB technician at a dealership before starting his own business.
I take the car in on the 10k miles to have the service done and I change the oil and filter in my driveway on the 5's . The way I view it, oil is cheap, changing engines is expensive. In my discussion with my mechanic , he was telling me about the bluetec system and how it operates, and how that system is diluting the engine oil. He suggested that if I am changing the oil every 5k miles then to stick with that. Over the years he said seeing the oil spec change, oil change intervals being shortend that as long as the addblue system is installed , the engine oil will suffer. He noted changing quite a few OM 642 engines for a rear main bearing being spun. Those customers had been following a long life oil change interval too.
As he was saying, the add blue system has a DPF installed, and as it begins to clog ,excessive diesel is injected to create more or less an incinerator to burn the DPF clean and injecting the urea add blue to reduce the NOX emissions. While the cycle of excessive diesel is being injected, it is getting past the piston rings and getting into the oil, diluting it.
Untill a way around the add blue system can be found, he would recommend that a 5k interval on the oil changes be performed. It seems crazy how it works, and they couldn't come up with a better way to meet the emissions? I get it was hard to control emissions with the older style injection system with a mechanical pump. But the common rail and electronic fuel injection control and Piezio injectors they couldn't get it to burn cleaner?
Everybody have a happy and safe Thanksgiving ! E350cruiser
I would keep changing the oil as you are. You didn't say which oil you are using though. Benzes with DPFs are supposed to use low SAPS (aka low ash) oil. MB229.51 and MB229.52 . These oils don't only have low ash, but are also formulated to stand the extremely high temperatures that occur in turbo-charged engines, especially when doing a Bluetec regeneration. Other oils may break down and leave deposits and sludge in the engine. Increased dilution of oil may also increase, especially as engines age and wear or perhaps deposits cause rings to stick. AS you mentioned, the air-fuel mixture is purposely run rich during regeneration to help burn off DPF deposits.
Other than the regular oil changes, driving the car at highway speeds regularly is what is needed to reduce DPF problems. Bluetec is really not suitable for a city commuter. Not sure where I saw it, but MB have a chart that says to reduce oil change intervals for cars that are city driven.
PS: We have had no problems in 5 years with our 2014 GLK Bluetec.
Some MB oil info:
MB sheet 229.5 approved oils; "MB Longlife Service Oils"
for passenger cars with gas and diesel engines with extended drain intervals beyond 229.3 oils, to 30,000 km, min 1.8% fuel saving, first oils introduced summer 2002. ACEA A3 B4. For gas engines of the M100 series, gas engines of the M200 series and diesel engines of the OM600 series (not models with Euro 4 diesel particle filters).
229.5 engine oils must be used with fleece oil filter designed for use with 229.5 engine oils.
MB sheet 229.51 approved oils; low ash long life
Mercedes pioneered this new spec for passenger cars with diesel engines with EURO 4 or Bluetec exhaust particle filters and longer service life than the 229.31 oils. The spec was introduced in 2005. Change intervals increased to 20,000 kilometers. Based on ACEA A3 B4 and C3."
MB 229.52 specification is for very high performance oil for engines with diesel particle filters and extended oil change intervals.
Specifically designed for the latest generation of �BlueTEC� Diesel engines with SCR (Selective
Catalyst Reduction) from DAIMLER group (Mercedes)
Last edited by 107123210; Nov 15, 2018 at 10:02 AM.
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