Amsoil found out the hard way. Some of their 25k oil filters for various engines were discontinued or not recommended. Some filters were rebadged for 15k intervals. Some engines load the oil up with combustion byproducts, or simply overcook the oil over time,.... These engines are usually called sludged monsters. I know that Amsoil pulled their super EAO filter for several Toyota engines. What does that tell you? If the filter has a bypass, why would it be an issue? Bypass is definitely not an acceptable bandaid for clogged filter media. Its there to protect the media and not your starving engine. Filter doesn't fail but your engine does. Great!
Synthetic filters supposedly flow well(when new). But, if they do filter down to a finer micron, how long will that flow last before that fancy filter simply loads up more quickly and becomes a clogged restriction or is bypassed? Cheap filters flow just as well but don't load up as quickly, and keep flowing. Sure, all particles add to wear. We just don't keep vehicles million miles long enough to see the difference. A synthetic filter, in bypass, won't filter better than a cheap filter not in bypass.
Don't fall for the $13 oil filter when that $4 filter will provide you all the wear prevention(flow and pressure) that your engine needs. It'll filter what needs to be filtered without going overly restrictive in a full flow circuit.
At what point does over filtration's oil starvation perform better/worse than under filtration's full oil flow? What does your engine need to survive? oil flow! There are those of us that believe that full flow oil filters are useless appendages. Either go bypass oil filter, or don't bother. Automakers don't bother. Industrial and commercial equipment don't short change filtration like automakers.
If you have an accurate oil pressure gauge, you can compare your pressure among different filters. Stick with one oil brand/weight when testing PSI. A healthy engine should be immune to oil and oil filters. Problem is, engines are manufactured with clearances/tolerances/materials/ethics which mean that many engines aren't even healthy when new, let alone the 10-20 years of wear inducing driving on our vehicles that we own!
If you remove your balance shafts, you'll have surplus oil pressure/flow for whatever fancy filter you want to use. If you install a higher volume oil pump, ditto! Stock tired oil pump, and we've seen plenty replaced in these forums, isn't what I'd want to use with an overpriced oil restrictor.
If you want more media, use a bigger filter. Oil filter drainback shouldn't be an issue unless you store the vehicle for days without driving, in which case ALL filters will drip dry.
Just about all oil filters, in the sizes that we can use, have BPV and ADBV. Nothing wrong with the OE filter other than I'm not driving 90 minutes to pick one up, and don't shop online when I don't have to. I also don't stockpile parts anymore. I also haven't seen superior engineering in OE filters. Lowest bid part!!!
Synthetic oil is a no brainer. We do have known issues with Toyota engineering repeating itself over and over(oil consumption, sludged engines, coked rings). Synthetic oil is a band aid and 'could' prevent those issues. Synthetic oil doesn't make up for ignorant owners but its a start. Other band-aids are oil coolers, increasing oil sump capacity, using a high volume and/or higher pressure oil pump.... which is easiest? Prevent severe oil oxidation and thermal breakdown by using a synthetic oil that can tolerate those oil temperatures, low oil levels, and negligent oil change intervals. Synthetic is a pretty big bandaid for many engines and owners. You can't beat that cold flow pumpability of a synthetic for us Northerners. Don't forget the superior film strength boundary lube capability of a that synthetic oil for when there is no flow/pressure(starting, or load change).
This thread is not about air filtration, which is more critical than oil filtration when compared to engine life. Concerning transmission filtration.... its another 'failure' effort by automakers.