I think this is the perfect example of bench racing a lube ...
Knowing and guessing are two different approaches.
UOAs, PCs, tactile and visual observations of the equipment will all combine to let you know how long to run an OFCI.
Subjective, marketing-driven, hysteria-induced emotional pandering will make for shorter OFCIs.
I've successfully and safely run inexpensive dino lubes, with great results I might add, far longer than most BITOGers would run a syn.
To each his own ...
Why guess when you can know?