Wear signs in engine oil analysis
Thread Starter
Junior Member
Joined: May 2023
Posts: 28
Likes: 8
From: Herveld, Netherlands.
2008 Mercedes-Benz W219 CLS 550
Wear signs in engine oil analysis
Hi all,
I’m stressing a bit, I have a M273 W219 CLS 550.
I’ve had a engine oil analysis done and aluminium and iron particles wear higher than the average on record by Blackstone Oil. Rougly 3/3.5 times more than they are usually seeing.
Also they found the viscosity to low to that of their average sample batch. About 10/12% too low.
Could it be that too thin an oil was used combined with too long an interval of the oil?
I have zero mechanical issues too report or feel, no low oil pressure signs, car runs impeccable. Feels quite healthy in every regards.
Also recently did a major service with spark plugs and the looked very much like they ran 83k miles as the use life of the car
When I changed the oil I didn’t see any visible metallic particles in either the oil change bucket or in the filter. Extracted close if not all of the 8.5/9 liters of oil that car takes so definitely wasn’t low on oil. The oil was black though.
I have belt and oil cooler housing jobs planned in november and will be changing the oil again than. And will run another test by than.
Does anybody have valuable insight to this?
How concerned should I be?
Any advise to abait or improve this?
I’m stressing a bit, I have a M273 W219 CLS 550.
I’ve had a engine oil analysis done and aluminium and iron particles wear higher than the average on record by Blackstone Oil. Rougly 3/3.5 times more than they are usually seeing.
Also they found the viscosity to low to that of their average sample batch. About 10/12% too low.
Could it be that too thin an oil was used combined with too long an interval of the oil?
I have zero mechanical issues too report or feel, no low oil pressure signs, car runs impeccable. Feels quite healthy in every regards.
Also recently did a major service with spark plugs and the looked very much like they ran 83k miles as the use life of the car
When I changed the oil I didn’t see any visible metallic particles in either the oil change bucket or in the filter. Extracted close if not all of the 8.5/9 liters of oil that car takes so definitely wasn’t low on oil. The oil was black though.
I have belt and oil cooler housing jobs planned in november and will be changing the oil again than. And will run another test by than.
Does anybody have valuable insight to this?
How concerned should I be?
Any advise to abait or improve this?
Thread Starter
Junior Member
Joined: May 2023
Posts: 28
Likes: 8
From: Herveld, Netherlands.
2008 Mercedes-Benz W219 CLS 550
I changed it with 5W40 liqui moly leichtlauf with the MB325.0 approval code from Mercedes. Gonna change it in about two months time again
MBWorld Fanatic!
Joined: Feb 2017
Posts: 2,307
Likes: 1,211
From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
and op,.. why wait a few months to change your oil if you just had a test that showed your oil has contaminants that will further wear the engine? It’s time for short oci and imo, a heavier weight of SP rated oil than you’ve been using.
Thread Starter
Junior Member
Joined: May 2023
Posts: 28
Likes: 8
From: Herveld, Netherlands.
2008 Mercedes-Benz W219 CLS 550
By than i will have driven not more than 2000 miles in total since the oil change. The reason im waiting those few hundred miles is that i need to open up some things like the oil cooler and filter housing anyway.
i’m not made of money by doing this job twice in 2 months seems excessive. Wouldn’t you agree?
Thread Starter
Junior Member
Joined: May 2023
Posts: 28
Likes: 8
From: Herveld, Netherlands.
2008 Mercedes-Benz W219 CLS 550
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MBWorld Fanatic!
Joined: Feb 2017
Posts: 2,307
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
i understand your point but between now and november the car will probably only drive 700 miles.
By than i will have driven not more than 2000 miles in total since the oil change. The reason im waiting those few hundred miles is that i need to open up some things like the oil cooler and filter housing anyway.
i’m not made of money by doing this job twice in 2 months seems excessive. Wouldn’t you agree?
By than i will have driven not more than 2000 miles in total since the oil change. The reason im waiting those few hundred miles is that i need to open up some things like the oil cooler and filter housing anyway.
i’m not made of money by doing this job twice in 2 months seems excessive. Wouldn’t you agree?
Thread Starter
Junior Member
Joined: May 2023
Posts: 28
Likes: 8
From: Herveld, Netherlands.
2008 Mercedes-Benz W219 CLS 550
Well, not sure I agree as I would want to make sure the car is not continuing to have an issue unaddressed. It was hard to tell if the oil analysis was from the oil still in the engine, and if thats the case, Id change it immediately. Im not made of money either and know that I would not want to replace an engine because I waited a bit too long to find the issue. I personally have a spare vehicle that allows me to park whichever car might need to wait for repair. If youre just talking about seals and oil and are doing it yourself, we are talking about a hundred dollars cost (US).
But I appreciate your suggestions and thinking along with me. Thanks.
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Joined: Apr 2023
Posts: 476
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2014 S63 2010 ML350 Bluetec 2009 SL550
If you dont have the money for the modest suggestions supplied here, this is not the car for you. These are expensive cars with expensive parts.
Bore scoring is not frequently reported with the M273 but lack of oil changes (using the wrong oil) could have seriously shortened its life.
Bore scoring is not frequently reported with the M273 but lack of oil changes (using the wrong oil) could have seriously shortened its life.
Thread Starter
Junior Member
Joined: May 2023
Posts: 28
Likes: 8
From: Herveld, Netherlands.
2008 Mercedes-Benz W219 CLS 550
If you dont have the money for the modest suggestions supplied here, this is not the car for you. These are expensive cars with expensive parts.
Bore scoring is not frequently reported with the M273 but lack of oil changes (using the wrong oil) could have seriously shortened its life.
Bore scoring is not frequently reported with the M273 but lack of oil changes (using the wrong oil) could have seriously shortened its life.
