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The one I just installed does not look like that. Easy to check before installation, is it is not a worry for me.

Uh ... no. You must be unfamiliar with how good modern polyester fiber is. It is used today in some of the best industrial filters. Also, most of the running rigging in a modern yacht is made from it, because it is so strong. Paper may block more light when put under a microscope, but it is...

You realize that you are comparing opaque paper with translucent polyester fiber ...

Because of the (probably carefully crafted) vagueness of the published information from PG, their unresponsiveness to questions, and the lack of any third party testing data, it is currently impossible to answer your question. All we have is assumptions and beliefs.

Here is my personal thought journey: I was looking for which would be the best filter to put on my Ecoboost 3.5. I had purchased a Motorcraft OEM filter and had it on my shelf, but evidence of poor-quality construction of recent Motorcraft filters made me question that purchase. Further...

Or it's the range of 99% or 100% efficiencies for the various sizes. We know from the Puralator spec sheets that the efficiencies vary between filter sizes of the same models.

Read post #30

We figured that out here: https://bobistheoilguy.com/forums/threads/ford-high-altitude-requires-0w-oil-why.359653/

Please stay on topic. This thread is about the efficiency of the PG filters, not the quality of PG, Fram, and M+H filters, or which country any of them are made in. There are plenty of other threads on those subjects.

I recall having it on the original Ford Taurus (late 1980's) or perhaps a 1990's era Lincoln Continental. I lived in Chicago and thought it was great! It would cook the ice off of the windshield in no time!

I remember once being advised by a lawyer that in corporate contracts and statements (e.g. insurance contracts) all ambiguity is in there for a reason, and it is usually not in your favor.

Not in my BMW. Stupid idea.

Is there any chance that this stuff is really from a different part of the engine and was filtered out by the filter?

I did a visual in-store inspection of the Ultra, PurolatorOne, Supertech, and compared it to my used Motorcraft for my EB 3.5L. The Purolator was the thickest and the only one claiming pure synthetic media. Next in thickness was the Motorcraft. The Ultra looked like a step down in quality and...

But on the Ascent tests, the WIX XP (lowest efficiency) showed the highest capacity, lowest differential pressure and the longest time to fill up, while the Royal Purple (second highest efficiency) had the second lowest capacity, highest differential pressure and shortest time to fill up. On...

In support of these statements, here is a Jim Allen quote on BITOG some years ago: "I just got off the phone with an engineering contact at a well-known corporation known for filtration. His specialty is engine oil filtration and I can only repeat what he said if he stays anonymous ... 'Here...

On this spec sheet it shows the M1 having 99%@50u and 50%@20u. That is why I concluded that the two filters employ different media: https://bobistheoilguy.com/used-oil-analysis-how-to-decide-what-is-normal/

Yes. Thanks!

Did you notice that the New Motorcraft FL2052S has media the looks at least somewhat like Fleetguard's Stratapore:

I am sure that there are readers on BITOG who understand my questions and know at least some of the answers. Please speak up.