2024 AMG oil

kschachn said:
Sure. Either due to engine design which causes excessive shear forces on the oil and degrades the VII. Things like gear driven camshafts. Or through excessive fuel dilution. As noted above use a lab that measures fuel directly such as via gas chromatography. Blackstone is useless at this.

However, Mercedes-Benz has a stay-in-grade requirement as part of the approval. So on the face of it a viscosity related failure should not happen unless there is a mechanical defect.
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forgot to mention... the dealership had to add 1 1/2 quarts of oil (I think there are 9 total) at ~4500 miles if that is useful info.
 
#18FAN said:
You may have a reason as why not to send it to Blackstone they won't measure fuel dilution properly if it exists and maybe lowering viscosity.
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I have enough of a sample to send to another analyzer. Any recommendations for one that would be ablet o measure fuel dillution? Also, would break-in also be more harsh on the oil?
 
edyvw said:
Did he mention engine rebuild? No.
So what is reliable? Which car with twin turbo hot V set up comes to your mind here when it comes to comparing reliability?
Or is this: “i know you want Porsche 911, but have you think of Honda Accord? Fun, and CVT is not that bad.”
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The engine in our X6 M Competition, is still running strong, despite the doom and gloom predictions from Internet read testers.
 
Scott Baer said:
For clarity....

The replacement car has 6k miles on it now. I just had it at the dealership for an "A Service" (oil change). I did let them know that I am starting to hear the same knock in this car. They said they listened, but could not hear. It was most likely cold which is why they didn't hear, because it is fairly obvious if the car is at temp and you listen; especially when they know exactly what they are listening for (my last car).

I wanted to wait until I had this oil change to see if the knock was still there before I moved forward with anything. So far, the knock is not there, but I have had only 30 miles on the new oil and I listened only once. More to follow with that.
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You have warranty so I wouldn't worry to much about it. BMW uses a similar architecture (S63/S68) on their V8's and they've had issues for years.
 
BMWTurboDzl said:
It's okay. There won't be a huge disparity and you really only care if the fuel was excessive like over 5 percent which I doubt it will be.
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I agree it would take a lot of fuel, but on the other hand Blackstone's numbers have been not only incorrect but wildly so.

I'd think you'd really smell that much fuel as well as see a dramatic rise on the dipstick. The OP says it consumed oil so I doubt that is happening.
 
BMWTurboDzl said:
You have warranty so I wouldn't worry to much about it. BMW uses a similar architecture (S63/S68) on their V8's and they've had issues for years.
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BMW worked so much on that engine, that now might be best V8 turbo on the market.
Latest version comes even with a dipstick!!!
 
edyvw said:
BMW worked so much on that engine, that now might be best V8 turbo on the market.
Latest version comes even with a dipstick!!!
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I really like the F90 M5 but owning one would be too stressful. My heart couldn't take it unless I had "bugger off" amounts of money. Haha.
 
Scott Baer said:
They sent the motor back to Germany for analysis. I would love to know the outcome. Unfortunately they kept the local MB rep insulated from me and I am not able to reach out to him to inquire.
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Who took then all those pictures of the crank and rod bearings and who sent them to you?
 
Scott Baer said:
Being that this IS an OIL forum, can anyone opine to the following... Can oil breakdown over time (6,000 miles) and become too "thin" to effectively create the liquid cushion required at the main bearings? in this case, it seems, only at idle...
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Yes, it can. Especially on a turbo car and especially if the car was driven hard. And especially if you were driving with the oil level below the minimum mark.

Also if an engine started having a knock, don't expect it to disappear or to get better. Usually it's the opposite - it gets worse it the time.
 
Last edited:
Japanese said:
Yes, it can. Especially on a turbo car and especially if the car was driven hard. And especially if you were driving with the oil level below the minimum mark.

Also if an engine started having a knock, don't expect it to disappear or to get better. Usually it's the opposite - it gets worse it the time.
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That oil won’t get “too thin” in 6,000mls bec. driven hard etc. It is MB approved oil, it is not regular synthetic ILSAC stuff.
I run 5,000 OCI with extensive track use and sessions as long as 1 1/2hrs.
Unless there is fuel dilution that sheared down oil so much, this is manufacturing defect.
 
edyvw said:
That oil won’t get “too thin” in 6,000mls bec. driven hard etc. It is MB approved oil, it is not regular synthetic ILSAC stuff.
I run 5,000 OCI with extensive track use and sessions as long as 1 1/2hrs.
Unless there is fuel dilution that sheared down oil so much, this is manufacturing defect.
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100% plain jane Mobil 1 Euro 0w40 holds just up awesome in several cars in my club that all have 800+hp......BMW/Mercedes/Audi/-we have have dude with a boosted up Alfa Romeo Guila Quadrigilio running the stuff fine
 
edyvw said:
That oil won’t get “too thin” in 6,000mls bec. driven hard etc. It is MB approved oil, it is not regular synthetic ILSAC stuff.
I run 5,000 OCI with extensive track use and sessions as long as 1 1/2hrs.
Unless there is fuel dilution that sheared down oil so much, this is manufacturing defect.
Click to expand...
And that engine is designed to be driven hard.
 
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