"MB"?
It's for a BMW.
Banter aside, does anyone have ~any~ technical analysis of these oils verses oils which did not submit for spec approval?
Rotella Synth, Mobil 1 HM, AMSoil, Redline, Brad Penn...?
The best 1.8t UOA I've seen was on API SM Castrol Edge. The best 2.0T UOA was on Brad Penn 10w-30.
How about a simple cost-benefit analysis? 15w-40 may fare well too.
Instead of a just a comparative UOA study, how about an elemental and physical comparison of HT/HS, volatility, TBN, additive levels, etc? I'm pretty sure some OTC synth oils are just as good as or better than BMW Castrol 5w-30, that's my suspicion.
I wouldn't go patting each other on the back without any technical comparisons to base the gruppe think on.