There are comments all over the web, and not just on Porsche sites. There are a lot af different agendas. One being a hesitance to go outside factory recommendations.
Well, I'm off warranty and was still reluctant. I probably would've gone with M1 5w-40 that is on the approved list had it been available in US.
The research is overwhelmingly clear. There are better oils that the factory and others are reluctant to recommend for a lot of reasons. Like the Factory being politically and environmentally EU correct. Another being lawsuits when an engine fails using a non-factory-recommended that was recommended by Party of the First Part, One Snake Oil Salesman of XYZ, LLC.
As most sellers say, "Do the research and decide what you need." Or maybe even "I would not put Mobil 1 in My Engine."
To which I say: I did, I did, and I won't.
