MB 229.71 vs. 229.72 vs. 229.52

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Friend owns a CPO 22 E350 with the 264.920 engine and left it with me for an oil change.

MB service information lists the following oil options in this order: 229.71 (0W-20, 5W-20), 229.61 (0W-30, 5W-30), 229.72 (0W-20), 229.51 (0W-30, 0W-40, 5W-30, 5W-40), 229.52 (0W-30, 0W-40, 5W-30, 5W-40).

It is my understanding that most dealers are filling the "older" 264 engines with bulk 229.52 5W-30; the newer 264 engines are now requiring 229.71/229.72 only.

Question A: Based on the Lubrizol comparison tool, I am not seeing any advantage to using 229.52 over 229.71. 229.52 appears to be a low-saps oil that was originally developed for diesel applications. 229.71 appears to be developed for gasoline engines and has more detergency, presumably making it more suitable for long drains. Thoughts?

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Question B: What is the difference MB 229.71 and 229.72? For the 2022 revisions, Lubrizol's tool shows 229.72 to have slightly stricter fuel economy standards. In the market today, I noticed that very few oils are approved for 229.72 and of the ones that are, they are also approved for LL-17FE+. MB is also mandating 229.72 only for certain higher performance models (e.g. GLE450 and AMG GLE 53 4MATIC+ Coupe), which leads me to believe that 229.72 has some performance benefits over 229.71?

On the other hand, 229.71 oils tend to be cross-approved for DexosD, VW 508/509 and Porsche C20.
 
Yes diesels don't need as much TBN for the same amount of miles on the oil compared to Gas engines. Diesel in the oil seems to be much less destructive than gasoline. Diesels need dispersants.

Is this customer doing long drains? the least bad option would be a higher viscosity oil for a shorter amount of time.
 
I believe 229.72 is the strictest but only if you are using a 0w20 otherwise its not applicable.
but what is easily available?(if you want a 0w20)
I'd use m1 esp x2 its 229.71
 
Is this customer doing long drains? the least bad option would be a higher viscosity oil for a shorter amount of time.
He is rarely on time for service. OEM interval is 10K and is known to exceed it by a few thousand miles. All of his driving is highway, but still…

Also, even though the interval is fixed, the vehicle was to know which oil is being used. I found this to rather fascinating.
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