San hints at shear strength/thermal stability. Lake Speed & Jake have emphasized this factor also.
Although I linked the article:
SECTION 1 – MOTOR OIL
I don't want to endorse a particular oil because I am unqualified to do so.
I just think a factual/informational discussion is useful & like to contribute sources,not (my) unqualified opinions.
Many of the competing retail brands are virtually identical yet make different claims. Why 'virtually identical' ? Because there are only a handful of base oil suppliers and an equally small number of additive package formulators. The worrying thing I see in my research work is the Chinese production of very cheap mystery oil additive packages that are finding a market here.
It would be interesting to hear from Lake Speed on the best level of anti-foaming additives in his DT40 for the M96.
This isn't a knock against the M96. Subaru also have band aids to deal with foaming & high-g oil-pick-up starvation:
Subaru Oil System Upgrades - Import Tuner Magazine
I hope this helps.