When you look at a particle count of used oil, even with a good oil filter on a clean healthy engine, there are 50,000 to 100,000 particles 4 microns and larger in every mL of oil. I'm sure it would many times more than that if no oil filter was ran.

No. Engines typically fail due to maintenance abuse or simply running the engine beyond it's intended performance level.

Late to this post(on vacation) Donaldson makes filters(full flow) that filter down to [email protected] and [email protected] micron. I adapted my S2000 to take one. Did this because I wanted to, nothing more. The Honda filter for the S2000 is a rock catcher, lucky to hit 85%@40 microns.

Rod

6) Oil Coolers
7) Oil capacity 15 Gallons
8) Develop most power at 1200 RPM

Fleetguard LF14000NN for the Cummins ISX15 is 98.7%@ 4 microns

Because you do not need more protection or the expense of it. As it is, with normal scheduled maintenance an engine will far outlast the vehicle its in.
Its not the oil or filters that determine the life of the engine, its the engine design that determines its life, oil and filters do not change that fact.

So Zee, the chart you posted means I need to change my Fram Ultra every hour of engine operation if I don’t want the 20 micron efficiency to drop somewhere into the low 80%- high 70% efficiency range?

Quite the conundrum. What does that do to flow rate? Isn't that just about the same argument with air filters? The better the filtration, the lower the flow rate?

Go back and read what I said about the ISO 4548-12 efficiency rating calculation, and how a high efficiency filter couldn't have a drop in efficiency like shown on that graph in order to achieve a 99% @ 20μ ISO efficiency.

Engines use positive displacement oil pumps. Engine oiling systems are not analogies to your house water system, which is a contant pressure source.

When a filter loads up, the flow stays the same from the PD pump, and the delta-p across the filter just goes up a few PSI.

Flow can still be very good on high efficiency filters, it all depends on the media design and media area.

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/5104536/1

I would agree with that. My biggest concern these days is ensuring I don't get something with closed louvers or media prone to tearing and have some reasonable construction quality, without spending a fortune.

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.

http://www.wixfilters.com/Speciality/Racing.aspx?1

Wix has a few interesting lines about resin content in filters and efficiency in the racing filter description. Frazier air flow, never heard of it discussed here.

Just another way to measure flow resistance, but it's not a standard for oil filters. WIX likes to make up many of their own specs. No way to put that into flow vs delta-p with oil flowing through the filter.

https://www.google.com/search?q=Frazier+airflow+test

Granted, super high efficiency oil bypass filters are primary used in heavy duty diesel engine applications where OCIs are super long, and there have been lots of studies done showing that cleaner oil resulted in less engine wear. I think this was posted by someone here at some point but worth showing again.

It is used for manufacturing oil filter media, judging porosity, and they can't use flowing oil for that. I have wondered about media manufacturing, and using resin as a binder, how they do that. To have consistent efficiency numbers the manufacturing has to be consistent, the resin consistent. Quality is important and why I never have trusted odd ball brands just to save a dollar. I think, not going to spend time reading all the ... on Frazier number. My dad had a Frazier car which burned up as we escaped from it. Too bad you probably say.

http://www.frazierinstrument.com/products/fap/fap-faq.html#Air Permeability - Frazier Number