Hey everyone I recently picked up my first ever s class. It’s a beautiful w222 2015 s550 rwd! Coming from the amg game I have religiously used liquimoly 5w-40 oil every 5k miles and every 3rd oil change 2 cans of ceratec and 2 cans of engine flush. As the title states I’m trying to figure out if these products are good to use on the w222 as there’s not many members who have posted on it. When I did use it in my amg’s I woukd notice the engine woukd quiet down significantly and in general the car felt like it ran better (maybe a placebo) any input would be great

thanks

Not sure if engine flush every 15k is necessary given you clearly are meticulous with oil changes. Currently I go with ceratec every 20k, and Mos2 every change. It worked wonders on eliminating my old m156's lifter noise.

Realistically, if you are changing Merc quality oil at 5,000 miles, there is little reason to do anything more than just change the oil.

I would only do the engine flush initially, not needed if all cleaned out. I too stick with 5K oil changes and its cast iron grey inside clean as a whistle, no issues. Mobil 1 0w/40 europ formula for me. MB oil, or liquid moly all good choices.
Ceretec is a once a year thing. Lasts up to 30K.

I have used LM Ceratec, LM Engine Flush, LM Oil Saver, and LM Molygen before in my W222. All at different times over the past 2 years. I did not note any significant difference with any of the products.

But in the end... the above post is correct. If you change your oil every 5k miles, and even use a half decent oil, you are doing more for your engine than any of the specialty products above.

I change oil at 5k-6K (I am busy), but I never did any modifiers in the oil, just 9.5L of Mobil 1 ESP and done.
The last S I had still goes strong after 17 years of the same treatment.

Thanks for all the replies, I ordered ceratec, flush and lm40 oil for my next (first service in my ownership) I’ll post my results, in all my current and previous cars I have had great success with these products

If you do oil analysis you will see how you oil is doing at the end of 5K. On the M278 motor I have found 5K to be a great change interval, and oil is not beat up using Mobil 1 euro formula 0w/40 with MB filter. I have alot of cars and each one has different oil life. But none go further than 7500. I use Blackstone labs. Without an oil analysis there is no way to know where you at, your just speculating. Good luck.

Couldn't agree more. "Sounds" and "feels" are subjective. Blackstone makes real data. And that consistently shows that LM products are fine but frequent OCIs are the most important factor.

Sounds beyond excessive. First off engine flush is should be a maybe 50k thing at best and like others expressed should be done initially as you don't know what was in there.

Remember at any fluid exchange its impossible to get 100% out of the engine so that flush is staying in there. When you keep added and adding you are diluting your oil with harsh cleaning agents.

I would add teh flush to the current unknown oil and put a fresh filter in before. Then change the oil and filter again. I would also shorten the next oil change by 1/2 to remove the majority of residual flush.

Oil is subjective but using anything beyond what is recommended is just for buying the pretty jug. I understand to some its a hobby and they like to fiddle with chemicals.

My old 2015 S550 had approx 60k when sold and they sent me pics when they did gaskets and the engine looked as new and all it had was the recommended MB service intervals which I believe is 10k. They make money on service so not sure MB benefit of extending if causes damages.

I didn’t add it to my current oil I throw it in right before I drain the oil. Are you recommending to add it in 5k miles during my 2nd oil change? The car has 92k on it not sure if it’s ever been flushed

That is the correct way to do it. Add the flush the day you are doing the oil change. I actually drive the car around the neighborhood nice and easy, pull in and drop the hot oil. Thats a good clean out. Then fresh oil and filter.

I have bought many used cars that I wanted to bring up to their best standard and understand what your doing. Do the above procedure. At 92K I would run the fresh oil about 2-3K and do the flush one more time. On clean oil if the flush comes out cleaner, I would be satisfied and do a fresh oil change, the LM Ceretc, and new filter. Then continue with 5K oil changes. The LM Ceretc would be a once a year thing thereafter. Good luck

I had been tracking (that is running the absolute snot out of the engine in) my Ferrari for 10L track miles and 40K actual miles (in my ownership) when an event occurred that had the opportunity to look inside the engine )we pulled the oil pan). . Running the oil at high temperatures (up to 300ºF) does all sorts of bad things to the oil {cooking off the lighter volatiles, consuming the anti-wear package, baking the viscosity improving molecules, and loading up with particles. About the only thing it does not harm in the oil is the acid-neutralizers.

I had been changing the oil every 5K miles and went to the track with fresh oil each track weekend.

The inside of the engine was absolutely pristine--no sludge, no varnish, no coloration on the aluminum,...

{The cause to "go in there" turned out to be a bad bearing in the transmission making the engine sound like it had a broken crankshaft.}

Still, we hear reports of engine damage in MBs all the time due to the long OCI--and as witnessed at "I do cars"