Just why would we need filters to be any tighter than 99% at 20um? The need for filtration has to be taken in context of not only the ultimate mileage goal, but also the OCI.
Here's a million mile Chevy; he ran normal oil and filters every 4k miles or so. Not one premium filter and no syn lubes. Just 4k mile OFCIs. (Oddly, he touts the money he saved with the K&N air filter, but didn't use BP filtration ....)https://www.knfilters.com/million/default.htm
Here's one of my favorites; a million mile Ford. https://www.bing.com/videos/search?...3259FEA528923CC055153259FE&FORM=VIRE
Actually, this truck had over THREE MILLION MILES.
I was curious about this truck, so I called that service center in Palm City, FL and got the story directly from the service manager. This truck was serviced almost exclusviely with Havoline dino 10w-40 and jobber filters it's whole life, with OFCIs anywhere between 7-10k miles. Here's the actual story of the truck:
- went it's first 100k miles and the 5.4L died; they sourced a used 5.4L from a junkyard because they guy has to be on the road non-stop (no time for a rebuild of the original engine)
- the first 5.4L replacement motor went around 1 million miles! then it died, so they sourced another 5.4L from a salvage yard
- the second 5.4L replacement motor went more than 1 million miles! then it also died; sourced a third used motor with low miles
- the third 5.4L used motor went more than a million miles, and the truck was totaled in a wreck
- the guy bought a used Ford SD diesel and was still running dogs when I last heard of him, several years ago
Summary; first engine died at 100k miles; next three engines all last 1M miles! All on the same service schedule and dino oils and normal filters.
My Point? You don't need super duper syn lubes or extra premium filters to make an engine last a long time. There is more than one means to an end.
Because contamination is low early in an OCI, then you don't need premium products; "normal" oils and filters will keep the engine clean enough to last a LONG time. If you choose to extend your OCIs as a fiscal savings tool, then syns and BP filtration are important to keep the sump clean for really long OCIs.
I have seen no proof whatsoever, nor has anyone here ever shown any evidence, that super-duper lubes and filters are the exclusive means to long equipment life. The VAST MAJORITY of data shows that wear rates trend down, even out to 15k miles of the OFCI, regardless of what products are used. This is true of every darn engine series I've studied. And there is ZERO correlation that allows us to conclude that low wear is the exclusive result of premium products. Even "normal" oils and filters exhibit this phenomenon. Because both normal products AND premium products both experience the downward trend of wear out to 15k miles, it's clear that neither is the controlling factor of wear. What has been proven to be a controlling factor is the TCB in normal OFCIs.
I have not seen any proof that is credible (in today's applications for normal OFCIs) that proves we need "more" filtration or "better" oils. Your car is FAR, FAR more likely to be totaled in a wreck, or rusted to oblivious, or traded out from sheer boredom, long before the engine dies, as long as you practice a sensible OFCI program with normal products.
So, the reason there's not a mass market filter that's "more" efficient is because it's not needed. It might be wanted, but it's not needed.