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How could I not? The manufacturer does not allow European customers to use any other brand than Mobil. This may be due to legal reasons but it seems other manufacturers are not subject to the same restrictions. Another aspect that concerns me is the dealers failure to provide a satisfactory...

Once again, I'm not a hater, where did you get that? Please read the post above to see why this debate has started. Hint: different manufacturer approvals. Owning a sportscar and using it on the track naturally compels you to select the best possible oil. It is peculiar that while US customers...

I'm afraid you got it all wrong. I have nothing against Mobil (but I may sense you are favoring it on this forum - based on this few posts). None of this posts would exists if European approval list would match the US approval. That's the reason I brought this all up. If anyone here is to blame...

Certainly, and that's where the financial aspect becomes significant. If we observe BMW, for example, today they may endorse Castrol, but tomorrow it could be (and is) Shell. While I don't object to a manufacturer recommending a specific brand, I do find the inconsistency in approval lists...

If I recall correctly, I came across a discussion on this forum stating that a higher TBN and a lower SA are desirable. These specifications may vary among different brands, so having this information included in the data sheet is beneficial. Are you implying that all approved oils possess...

TBH, I didn't pay much attention. I wonder why they would omit such information. As I mentioned before, one can compare different brands and make a decision based on personal preferences. When comparing Motul, Mobil, and Ravenol, I fail to find any valid reason to favor Mobil.

Oh, there were instances in the past, around 10 years ago, where Mobil oils lacked the HTHS number in their data sheets as well. ;) LM, AFAIK, involving C40 specification oil, does provide all the necessary information.

Oil-club.de frequently publishes numerous oil analysis results, mostly focusing on the correlation between viscosity index and the mileage.

To me both factors are important. It's hard to be trustworthy if you're not transparent. :) I can rephrase the question: What are the contributing factors that lead individuals to perceive Mobil as being more transparent when compared to other brands?

In my opinion, a used oil sample that shares comparable specifications to a new oil sample is worth considering as a primary choice.

I understand what you are saying. It makes perfect sense. But in this case we have two documents (both from the same factory and both with worldwide parameters). One document suggests that 16 brands possess valid approvals, while the other asserts that only one brand has obtained such approval...

Can you provide any supporting evidence for your statement? What factors lead you to perceive Mobil as more trustworthy compared to other brands?

Indeed, that is the dilemma. While the US document indicates that several brands have legitimate approval, the European document does not acknowledge the same. Measuring degradation is pretty straightforward. You begin by analyzing two fresh oil samples and then after several thousand...

Not really a productive post. Where did I say it's junk? Please re-read the last 10 posts.

To put it simply, you can compare the specifications of different oils and then assess the degradation of used oil to determine which oil performs better in terms of degradation. Certain oils are formulated without the use of viscosity improvers, which means they are more resistant to...

Simply because you can buy oils with significantly superior specifications for the same price or even less. I am also troubled that Mobil doesn't disclose certain information, such as sulphated ash and total base number (TBN) in their datasheet. Both play a vital role in engines equipped with...

BMW (globally), similar to Porsche in the US, provides a comprehensive list containing all approved oil brands. Therefore, regardless of the dealer's recommendations, customers can still find oils from various brands that are approved by the manufacturer (BMW). It is important to distinguish...

I understand, I wasn't seeking help but rather highlighting an inconsistency. The information on the datasheet and on the container is the same so I'm positive it's valid and accurate. I still find the difference between the US approval and the European approval peculiar. One could speculate...

But that's exactly what the EU dealers and the document are saying. Please see the attachment. When asked about the 5W-40 grade the conversation stops. No more replies. ;) I'm curious about the status of the approvals. If the US document indicates a valid approval, but the oil datasheet...

Thanks for replying. I apologize for any confusion, I may have been unclear. Regarding validity, I was referring to the expiration dates which are still in effect. Consequently, their approvals should also remain valid. However, upon examining the specifications of one particular brand, it...