vacs550

anyone using LiquiMoly Ceratec with Mobil 1 in 2016 S550? if so, is it worth it?

chassis

No oil or fuel additives are necessary, or "worth it". Change the oil at the prescribed intervals, and burn premium fuel.

cfmistry

Yes I have used it in my S550 and also used LM Molygen. I did not notice any difference. I believe the best thing you can do is routine (not extended) oil changes.

seamus2154

Mobil 1 5w/40 or ow/40, MB Filter, 5k oil change. The MB 10k oil change is way too long. My oil analysis at 7K was the limit for me. I just do 5k in all our MB.

Mitch Alsup

Modern oils, of appropriate grade and specifications, do not need additives.

TechSurfer

I used Mobil 1 Euro 0W-40 for many years in several different Mercedes ('09 C230, '00 ML320, '08 E350). I had an ongoing issue in all of them, with the oil turning black after about 2k miles and the engines wearing out. They would also consume oil.

The Ceratec is very popular. It is boron nitride. Some people, however, find that it fouls spark plugs.

Through my own research, I found Red Line High Performance is the very best oil money can buy. The main advantage is that you can use 0W-30 in your turbocharged S550 and still have the protection of 5W-40 because the HTHS is so high (3.4). The protection lasts for thousands of miles because it's not some additive trick. It contains very stable, ester-based molecules that are Class V oil. I combine it with Archoil AR9100 in my '08 E350. The Archoil a more modern, hexagonal boron nitrate formulation than the Ceratec. It is used by all kinds of industrial diesel and gasoline engines, from construction, to marine transport, to fleet engines to reduce molecular sliding friction and metal-to-metal contact, fill microscopic asperities, coat parts during cold startup and greatly increase the total base number (TBN). Field testing of used oil often shows that drain intervals can be extended 2-3 times as long.

My pickup and transmission shifts in my E350 are now noticeably better. My gas mileage went from 26.5 to 32 MPG on the highway. I don't have any more blackened oil, probably because I am getting better ring seal with a lighter oil and better compression with smoothed asperities. It's all expensive, but definitely worth it!

Mitch Alsup

What oil-change-interval did you use ?
And can you describe you typical driving style ?

I, too, have used a lot of Red Line Oils over the decades.
A decade ago (maybe a tad longer) RL had a 10W-30 oil with an HTHS of 4.2.
And, yes, only ester based oils can get these kinds of HTHS numbers.

Cubic Boron Nitrate is used in making cutting tools for the hardest substances (like forged and heat treated 4140 at Rockwell 63)
I am surprised the hexagonal BN is a friction modifier.

gone gone gone

For cleaning out the rings, I'd suggest doing searches on Bob is the Oil Guy (BITOG) forums.
There is much info on the OM642 and oils. High Performance Lubricants makes high AN and Ester oils for cleaning up engines, particularly rings. A "cleaning oil" that is used for 2k miles at a ratio of 1 in 5. They also make a 5W-30 Euro oil that "meets" the MB 229.51 approval and ACEA E3 specification. There are no flushing chemicals or solvents in these oils, they are formulated with Ester and AN base lubricants that do the cleaning.
These are highly regarded on BITOG and there is plenty of photos and used oil analysis of results. It cleaned minor sludging out of our 2010 BMW with N52 engine.
High Performance Lubricants Website

However, the most common cause of oil consumption issues with OM642 engines is the CCV (PCV) system. The CCV Cover at the back of the left bank head has a rubber piece that rides against the cam with integrated separator. Simplistic explanation; The rubber piece wears out and allows unseparated crankcase fumes to be sucked in around the cam and through to the intake in front of turbo. The diaphragm in the Breather Assembly will also wear out and the whole assembly needs to be replaced to stop the oil consumption at that source.
CCV Cover

Breather Assembly