Well I can let you all know that there is another oil that most people may have heard of but didn't know it was available for european cars.
Check out amsoil.com and search your car on the right side of the page under product lookup guide.
Once you go through everything it will tell you what oil you need as well as how much you need, and filters you need too.
Amsoil also has a great selection of fuel additives for better performance and fuel filter cleaning as well as an octane boost for the track days.
Any questions, let me know.