Hahaha,
yeah - the marketing guys are in.

And the believers are also in.

And now i'm in.
Don't use a low SAPS oil.
Only use a full synthetic oil.
Use an oil that has a viscosity that fits to your climate.
Change oil and filter frequently. I would recommend yearly, but that is my opinion.
Brand: i don't care.
Zinc: hahaha, i don't care. I love my catalysators - so no zinc.
Sulfur: i care - strictly a very big no.
I would never use a W30 oil over here in Germany.

But hey, it's not my engine.
I use 5W 40 or 5W 50.
Mostly i use oil that is made in Germany that has the highest HTHS for the budget.
Porsche has an oil approval called A40. So to me an oil that reaches this standard would be the minimum.
Last time i bought a 20 litre can. It's cheaper – especially if you have more than one car and change the oil frequently.
Regards, Markus