Very timely post. I am about to put 5w50 European Car (FSx2) into my car, but debating putting the new Dexos R supercar in. Word on the street is it has more ZDDP, and more Boron
It is interesting that this VOA for 5W50 Euro FSx2 is lower in Zinc and Phorhorus that used oil analysis others have posted of this oil.
To the comments that Mobil 1 oils are on the low side of viscocity. The exact reason I decided to move away from 0w40 Euro, to 5w50 Euro F2 for my A40 spec'd car.