These arguments always seem to follow this circular path:

Broad assertions, then specious scientific justifications, then detailed analysis getting down into the minutiae, and then a big step back with "well I [me, my friends, my dad,, my customers] have used this for 25 years and their motor didnt stop"

anyway, certifying an oil is very expensive- this is why most boutique oils do not get certified. Not enough market to support the cert process

The real truth is simple:

Virtually ANY oil will be fine in ANY engine if changed often enough. Ive gotten hundreds of thousands of miles out of multiple engines running dino oil. Perfectly clean innards.

People WANT to mess with their cars...they are COMPELLED to do something...so they slap on BS air filters, BS "cold air intakes" and run 'super special oils" that swell their chests with pride. They spend more money on an oil filled with stabilizers, that is intended to support a 20k+ OCI, yet change it with stock intervals (or worse, never do a UOA to know if their chosen OCI is adequate)

The guys that run serial Used Oil Analyses, and really understand what is going on, recognize that any top shelf oil is fine- with virtually none significantly better than another. And if there are differences, UNLESS YOU RUN UOAs, EXTENDING THESE RESULTS TO OTHER CARS/APPLICATIONS IS IRRESPONSIBLE SALESMANSHIP.

Run UOAs with every change, track the results, adjust the OCI. Any descriptors about how the motor 'feels' is just BS.

IMO