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C250 - 1.8L - LiquiMoly MOLYGEN - long term use?

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Old Dec 28, 2023 | 12:23 AM
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C250 - 1.8L - LiquiMoly MOLYGEN - long term use?

Out of curiosity, is anyone running the liqui moly MOLYGEN in their c250? It’s the 5w-30 in the GREEN oil jug.


any feedback is appreciated.


ant
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Old Dec 28, 2023 | 01:16 PM
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I do not. I use the Mobil1 0W40 because it seems to cover the widest temps and its on the Mercedes approved fluids list. My Operators manual says use MB 229.5 approved oil.

I looked up the Liquid Moly 5W30 green bottle and do not see it being approved by Mercedes. But there is another 5W30 that is.

Is it bad to use non approved oil, I dont know. But I like to keep it simple so theres no guess work.



Heres the green bottle:










Last edited by TimC300; Dec 28, 2023 at 01:24 PM.
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Old Dec 28, 2023 | 01:46 PM
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Originally Posted by TimC300
I do not. I use the Mobil1 0W40 because it seems to cover the widest temps and its on the Mercedes approved fluids list. My Operators manual says use MB 229.5 approved oil.

I looked up the Liquid Moly 5W30 green bottle and do not see it being approved by Mercedes. But there is another 5W30 that is.

Is it bad to use non approved oil, I dont know. But I like to keep it simple so theres no guess work.



Heres the green bottle:





Appreciate the info @TimC300 !

I read the same thing in one of the threads that the green stuff doesn't meet MB spec. Like you, I will continue to run the mobil1 0w40.

Ant
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Old Dec 28, 2023 | 01:46 PM
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Another reason I use Mobil1 is price. Usually find it at Walmart and Amazon for around $27 for 5qt jug. Then I'll go on the Mobil1 website and look for rebates. Sometimes they have $6-$10 rebates on 5qts, except they exclude Amazon but its good for Walmart. One time I got a nice Mobil1 cooler bag.


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Old Dec 28, 2023 | 01:58 PM
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Originally Posted by TimC300
Another reason I use Mobil1 is price. Usually find it at Walmart and Amazon for around $27 for 5qt jug. Then I'll go on the Mobil1 website and look for rebates. Sometimes they have $6-$10 rebates on 5qts, except they exclude Amazon but its good for Walmart. One time I got a nice Mobil1 cooler bag.

Damn nice! Yeah totally agree about Mobil1 and the price.

Just got 6 qts from Amazon for $43 and an OEM MB oil filter for $16.

They were doing an extra $10 off the oil.

Ant
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Old Mar 13, 2024 | 01:53 PM
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Originally Posted by antboii
Out of curiosity, is anyone running the liqui moly MOLYGEN in their c250? It’s the 5w-30 in the GREEN oil jug.


any feedback is appreciated.


ant
Hi everyone,

Bumping this thread again.

Anyone running the MolyGen 5w-40 new generation oil in their m271evo 1.8L c250?

looks to meet the Mercedes spec for oil but was curious to see if anyone is running it and their experience with it.

Thanks ,
Ant


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Old Mar 14, 2024 | 01:53 AM
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Liqui Moly recommends it for 229.5 applications but doesn’t have the actual approval. They do have approved 229.5 oils, so that’s a red flag to me. I would want to see that it had zinc and phosphorus levels equal to their oils that do or to the Mobil 1 Euro before using it.

Anything else is an experiment at the risk of your engine.
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Old Mar 14, 2024 | 08:16 AM
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To my knowledge that oil is not approved for our cars. They have a couple oils approved though. I will only use an oil approved by MB, I don’t know why it’s not approved but unless it is I wouldn’t use it. Not all oils are right for our cars. If I remember though it’s supposed to be orientated towards turbo cars. This is a couple years ago but this is direct from MB;


Thank you for your e-mail to our colleagues in Stuttgart, Germany. They forwarded it to Mercedes-Benz USA for response.


I have provided the approved oil brands below:

76 Pure Synthetic Motor Oil SAE 5W-40
Mobile 1 0W-40 SAE 0W-40
Mobile 1 Formula M SAE 5W-40
Mobile 1 New life 0W-40 SAE 0W-40
Mobile SHC Formula MB SAE 5W-30
Mobile Super 3000 Formula MB SAE 5W-30
Mobile SHC Formula MB 5W-30 SAE 5W-30
National Synthetic SAE 5W-40
Q Horsepower Full Synthetic SAE 5W-40
Q European Engine Ultra SAE 5W-30
Valvoline Synpower 5W-40 SAE 5W-40
Valvoline Synpower HST SAE 5W-40
Pennzoil Platinum European Formula SAE 5W-40
Pennzoil Platinum European Formula Ultra SAE 5W-30
Castrol Edge Professional SAE 0W-40

The opportunity to respond is appreciated.
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Old Mar 14, 2024 | 09:56 PM
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@Just204. @Odd Piggy - thank you both for the responses. I am hesitant to run it in my m271evo. FCP Euro offers a MolyGen oil change kit which is why I brought this topic back up.

I typically only use the mobil1 euro FS 0W-40.

However, I did an oil change on my fathers 2002 e430 m113 V8, when I did plugs, coils and used the MolyGen oil for that oil change. It's been about a month and so far so good with his car.

My buddy has a bmw 335i x drive and swears by it as well.


Again, thank you for the responses. Looking forward to hear feedback from others.


Ant
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Old Mar 14, 2024 | 10:02 PM
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Is it the case that MB has a list of approved oils that include all the engines they manufacture?
Or is it by specific engine?
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Old Mar 14, 2024 | 10:13 PM
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Originally Posted by MB2timer
Is it the case that MB has a list of approved oils that include all the engines they manufacture?
Or is it by specific engine?
I think its specific to what your vehicle requires depending on the MB spec (229.5) for example.

Here's the approved operating fluids website by MB. - https://operatingfluids.mercedes-benz.com/sheet/229.5

It gives all the approved oils for each spec requirement. You can toggle it by clicking the oil icon in the top left corner of that page depending on what your car requires.

Liquimoly is on the 229.5 approved list but not MolyGen specifically.

Hope this helps

Ant
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Old Mar 14, 2024 | 11:12 PM
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Might be an issue with long oil change intervals a lot of manufactuers are using these days but it'll be fine if you do your own every 5000 miles. Moly has a super strong bond in one direction and super weak in the other and literally plates/adheres/sticks to metal. Some people just do small maintenance doses after the first treatment to replate any that might have rubbed off. That way you get all the benefits without all the sludge.
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Old Mar 15, 2024 | 12:21 AM
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Originally Posted by antboii
However, I did an oil change on my father’s 2002 e430 m113 V8, when I did plugs, coils and used the MolyGen oil for that oil change. It's been about a month and so far so good with his car.
Let me respectfully point out that the 4.3L M113 (275 HP, 64 HP/L, 5500 RPM red line) is decidedly low performance compared to the 1.8L M271EVO (201 HP, 112 HP/L, 6750 RPM red line) even though they both specify 229.5 oils.
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Old Mar 15, 2024 | 07:51 AM
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@Odd Piggy and @Crito - thanks for the insight here.

I do my oil changes on all my vehicles at the 5k mile interval so no worries there.

I wasn't aware the m113 was a lower performance engine than ours. But makes sense as it's 10 years newer with more electronics and output being an I4 engine.

I'm still up in the air if I will run it but thank you all for the feedback. Keep it coming !

Thank you,
Ant
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Old Mar 23, 2024 | 12:22 PM
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Hey Everyone,

I am going to be using the liquimoly MOLYGEN for the oil change I am doing today.

5w-40 new generation fully synthetic

I have been doing a lot of research on the oil and I believe this will help a lot of known issues with the m271evo engine.

I just performed a sound test/decibel reading before I change the oil. Previously I have been using Mobil1 euro formula 0w-40, changing every 5k miles.

i will do another sound reading after I change the oil for comparison and post videos.

I also took a pic of the MPG I had before I filled up this morning, to compare fuel economy.

will report back with observations once I change the oil.

ant

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Old Apr 7, 2024 | 11:47 AM
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Hey Everyone,

I posted the sound decibel test on my YouTube channel comparing the mobil1 0w-40 and the New Generation MOLYGEN 5w-40 oils.

Check it out @ antboiis garage!

​​​
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