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The terms "highly doubt" and "What does copyright and trademark rental company even mean?" means you don't have a clue on this subject. You are just operating off of your imagination, not facts. Too bad - I was hoping for some insights, not emojis.

You don't think that Mobil sourced the media, and then outsource the manufacturing to M+H? If not, why do the specs differ between the Mobil product and comparable M+H products? Do you know for a fact that this is really an M+H product in all respects for which M+H is only renting the Mobil...

No argument intended. I very much appreciate the facts and discoveries you are providing, as I am sure many other BITOG readers do. I was just attempting, perhaps clumsily, to add to your report some details I had discovered, and thought would be of interest to the BITOG readers, in case...

Note that the M1 has different media than its Purolator competition (Boss and PurolatorOne), even though they are all made by Purolator...

This is a rock catcher. It is good at catching pretty small rocks and chunks of metal from my experience. From a 1500cc VW Beetle: The oil filters being regularly labeled "rock catchers" on BITOG are nothing like this. On BITOG the term is being used by some as a derogatory name for some oil...

Please tell us more ...

Actually, they don't claim a rating of 99% at 25 microns. They claim "99% Multi-Pass efficiency and removal of particles as small as 25 microns". If challenged, they could back up that claim by showing that they ran an oil sample through the filter, say, 1000 times and sure enough, got 99% the...

https://bobistheoilguy.com/forums/threads/fram-endurance-flashlight-test-in-canister.386911/post-7128028

I actually don't have trouble making sense of it. It is another source of independent testing data, like the Ascent tests were, and I find it a valuable contribution to understanding the field. The tests were done recently on models still in circulation. All of the tests were done on the same...

I was just trying to answer Glenda's question.

Have a look at the results for the Toyota filter to get some feeling about how many larger particles were in the brew: Yet none of those larger particles found its way through the leak you are hypothesizing?

So why did the leaks that you hypothesis only allow particles less than 38 microns to leak in all three filters?

They do look a little different. The Fram looks more like chopped media (like microglass): you can see the ends of some of the strands, while the Amsoil looks more like media where it is almost all the same strand (like Fleetguard's Stratapore). The variance between the strand thickness is...

I assume you are talking about the Endurance, Royal Purple, and Amsoil filters. Whip City demonstrated convincingly in one of his analyses that at least two of them have different backing material on their media. He also mentioned that the media looked like it had been marked with different...

I thought that as well, but when I looked at the particle counts, I don't think the leak theory holds water (or oil ;)): If the oil had leaked around the filter media, I think we would see higher particle counts in all of the sizes, not just the smallest size.

Or anything made by Champion Labs or Purolator. Doesn't leave much, does it ...

I just did.

Here is the reply: "The specification sheet for the PBL30001 shows 99% efficient at 46 micron. What is on the specification sheet is correct. What is on the website will be updated to reflect the same at 99% efficiency." Mystery solved ...

In the photos most of the louvers are unfortunately not in very good focus. But it looks to me like there are alternating rows of louvers facing in opposite direction, making the rows looking away from the photographer look "closed". Is that the correct interpretation?