The point of the thread is that there used to be a substantial difference between the MO-041 and MO-899. A completely different design, 20% more filter media and a much thicker canister. There was at least something arguably worth paying more for.
That filter…the old, Wix-based MO-041 could run a lower bypass PSI setting without increasing its tendency to actually bypass in use, because it was less restrictive in the first place. It wasn’t and isn’t a case of simply sticking a lighter spring into the same filter and getting “more flow”. All other things equal, doing that only guarantees it bypasses more, and filters less of the oil already being forced through it by a positive displacement pump with a very high pressure relief setting.
A filter in bypass is a rare and undesirable condition, not a design feature.
