Original Mercedes Oil Vs. Liqui Moli

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Peter Michaels

Active Member
Joined
Feb 25, 2017
Messages
154
Location
Cleethorpes
Car
2008 C-Class 180 SE Kompressor 1.8 Saloon
Hello
How does Mercedes original engine oil compare with Liqui Moli
please? What is your experience ?
Is the Mercedes oil of very good quality?

Also if i use original Mercedes oil
is it ok to add Liqui Moli Ceratec
to it?

2008 C Class 180SE Kompressor

Many thanks
Peter
 
Hello
How does Mercedes original engine oil compare with Liqui Moli
please? What is your experience ?
Is the Mercedes oil of very good quality?

Also if i use original Mercedes oil
is it ok to add Liqui Moli Ceratec
to it?

2008 C Class 180SE Kompressor

Many thanks
Peter
Peter

There are many, many threads on oil and quality comparisons on her. Try searching and reading, there is a lot of information for you to digest and compare. We really do not need another one.


Briefly, Mercedes do not manufacture oil, they specify a performance criteria and buy it from suppliers such as Petronas, Fuchs etc. Clearly is is of good quality or they would not use, sell or recommend it for their vehicles.

As for adding other compounds, well many are Snake oil with many claims about improved performance in areas, decreased wear etc. Very few are proven in fully independent testing. Read you hand book, MB usually state that additives are NOT recommended. Using a good quality oil and filter with regular changes are all you need to ensure your engine is protected.

Ask yourself this : If these additives are so good then why do MB etc not specify them for use themselves?
 
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Hi. I have no idea, however, as MB recommended oil is what the car is supplied with I would be surprised if anything could better it.
Then again I am no expert.:)
 
You can always better an oil in a given performance perameter , people are vague and don't give a viscosity or spec .

Best give a link to actual products to begin the comparison .
 
You can always better an oil in a given performance perameter , people are vague and don't give a viscosity or spec .

Best give a link to actual products to begin the comparison .

True but my point was that MB etc specify oils of more than adequate quality to do the job, you have recently kindly published specifications and technical explanations etc at length in another oil based thread. the OP has been pointed towards this and other threads that contain answers he may find useful.
 
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This thread may be of interest Oil

Some well thought out replies, and some useless ones too.
 
Liqui Moly GmbH was founded in 1957 in Ulm Germany on the river Danube. The patent for production of molybdenum disulfide formed the basis for the company. This additive based on liquified molybdenum disulfide (MoS2) was the company's first product and gave the company its name. They are a specialist lubricant company perhaps similar to the British MILLER'S OILS.
If their engine oil meets Mercedes MB 229.5 spec it should be fine.
MB 229.5 - Multigrade engine oils (Specification 229.5) - Mercedes-Benz Specifications for Operating Fluids
 
Oil specifications in handbooks are frozen in time whilst oil development continues , upgrade...


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Molybdenum Disulfide is a very powerful friction reducer oil additive that can be added to engine oil. But it is not an oil in itself.

In the olden days I used to add a can of Moly after every engine oil change (only downside was that the fresh new honey-coloured oil instantly became charcoal-black :( ).

However the engines in those says were much simpler, as was the oil (Castrol GTX mineral oil etc).

So when it comes to modern engines working with very fine tolerances, and modern engine oil which is a complex chemical product, I would not add anything to the engine oil, and would only ever use oil that meets the manufacturer's spec.
 
Using ridgedly to the manufacturer spec is really only an in warranty thing.

Pick wisely and you can gain protection and or economy .
 
Not aware of many modern cars with oil related wear which has been serviced regularly with manufacturer spec oil!!

Most failures are caused by poor quality OE parts or maintenance not lubrication so use any brand oil you want as long as it meets or exceeds OE spec.
Oil additives are not required or needed in a modern engine.
 
There are some , with VW it's PD camshafts and 505.01.

Glad you mentioned any brand , a spec is a spec regardless of manufacturer approval .
 
Would put the PD issue alongside the VX chocolate camshafts on 90s astra/vectra-- Poor design/quality?
 
I think there is too much emphasis on the magic ingredients in oil that will prevent wear. If you have hydrodynamic lubrication going on then any old oil that keeps the bearing surfaces apart will prevent wear. So in normal use the crankshaft and bearings tend not to be oil quality critical. The fancy additives come into play when there is the potential for metal to metal contact in areas like cams and drive chains. This leads me to the view that oil quality is mostly an issue when engine design or component quality leads to more demands on the oil. The PD issue being a good example where they were asking too much. The old engines that would run for a few hundred thousand miles on ordinary mineral oil were less demanding and didn't have as many design or material flaws.

After anti wear additives, much of the "quality" in modern compared to old oil specifications is to allow extended drain intervals so it's about an oils ability to resist degradation in use. While there are issues like ability to withstand high temperatures in turbo's the synthetic vs mineral debate is more about how long the oil will last rather than how well it lubricates. Synthetic oil isn't magic which is just as well because MB's own oil isn't a true synthetic.
 
True , just a group 3 - severely hydrocracked mineral that is allowed by law to be classed as a synthetic.

That is why I love the supremacy of VW 504.00 507.00 as it's group 3, and true synthetics , group 4 and top group 5 ester .

No marketing gimmicks just top quality oil basestocks .
 
Have we confused the OP?

He has not come back to the thread so fr............
 

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