Beware a Wix with louvers?? C&P Virgin Wix ProTec PXL10332 - Toyota 90915-YZZN1 equivalent

[Fair enough]

The bubble point test is not designed, nor requires testing of the bypass valve to continue on to the ISO efficiency test - the bubble point test is only to test the filter media, nothing else. The bypass valve is tested in ISO 4548-2 as already mentioned. And that test doesn't say anything about testing any seal like a leaf spring to the end cap, so I doubt anyone actually does any kind of ISO testing to verify that seal. If the leaf spring "seal" leaks, it's going to be seen in the ISO 4548-12 efficiency test as lowered efficiency. Fram engineers who designed the OG Ultra used the leaf spring fiber seal in the end cap to make it high efficiency by preventing any dirty oil leakage past that sealing interface.

No one said the bubble point test was designed or required to test the bypass valve. But it does test it, if it has it. You are saying things probably everyone knows.
Don’t jump to conclusions so fast about lowered efficiency if the bypass leaks. For one, it depends how much, two, no one knows. Hasn’t been tested.
Actually Fram probably has tested it without knowing, since so many have leaky springs with their using the Champ design and ruffling things up.

 

[ZeeOSix]

No one said the bubble point test was designed or required to test the bypass valve. But it does test it, if it has it. You are saying things probably everyone knows.

I highly doubt "everyone" knows the details of these ISO tests. So I'm pointing out and making these comments to clarify, mainly for those who don't know the details.

Don’t jump to conclusions so fast about lowered efficiency if the bypass leaks. For one, it depends how much, two, no one knows. Hasn’t been tested.
Actually Fram probably has tested it without knowing, since so many have leaky springs with their using the Champ design and ruffling things up.

You think a leak around the media isn't going to effect the ISO efficiency? If there is a 10% leakage of dirty oil past the media from whatever (ill formed leaf spring, torn media, etc), it's going to impact the particle count down stream. It doesn't take much leakage to impact the downstream particle counts that are going on in real time during the test.

How do you know the filters that Fram (or anyone else) ISO tested didn't have nicely formed and smooth leaf springs? They were well formed and smooth at one time. Nobody knows when those ISO tests were done. I have a feeling if the efficiency came in way less then expected, they would investigate why and fix it. But if that was the case, manufacturing quality (like ill formed ruffled leaf springs) could happen any time after the ISO efficiency verification testing was done, then you have a leaky and less efficient filter being sold at the stores.

 

[Glenda W.]

I guarantee manufacturers send the very best built filters to ISO testing. Their advertising depends on it. Now if we had random filters pulled off the assembly line unannounced that would be interesting. “Spot checks”.

 

[ZeeOSix]

I guarantee manufacturers send the very best built filters to ISO testing. Their advertising depends on it. Now if we had random filters pulled off the assembly line unannounced that would be interesting. “Spot checks”.

The ISO testing Ascent did was filters right off the shelf. But filter manufacturing quality seemed to be better back then. Plus the Ultra he tested had the leaf spring sealing ring in the end cap.

 

[Glenda W.]

The ISO testing Ascent did was filters right off the shelf. But filter manufacturing quality seemed to be better back then. Plus the Ultra he tested had the leaf spring sealing ring in the end cap.

I remember that. He asked us which filters we wanted tested. That was a once in a lifetime opportunity!!

 

[Fair enough]

I highly doubt "everyone" knows the details of these ISO tests. So I'm pointing out and making these comments to clarify, mainly for those who don't know the details.


You think a leak around the media isn't going to effect the ISO efficiency? If there is a 10% leakage of dirty oil past the media from whatever (ill formed leaf spring, torn media, etc), it's going to impact the particle count down stream. It doesn't take much leakage to impact the downstream particle counts that are going on in real time during the test.

How do you know the filters that Fram (or anyone else) ISO tested didn't have nicely formed and smooth leaf springs? They were well formed and smooth at one time. Nobody knows when those ISO tests were done. I have a feeling if the efficiency came in way less then expected, they would investigate why and fix it. But if that was the case, manufacturing quality (like ill formed ruffled leaf springs) could happen any time after the ISO efficiency verification testing was done, then you have a leaky and less efficient filter being sold at the stores.

Everything I said looks correct.

 

[ZeeOSix]

Everything I said looks correct.

Speculation always seems to be "correct" in the mind making the speculation.

 

[Fair enough]

Speculation always seems to be "correct" in the mind making the speculation.

Why in the world would that be? I put probably in my guesses, go back and see.That’s not saying they are correct, probably. I said everything I wrote was correct as far as I can tell, and it is. If it isn’t correct I have no problem saying so. I’m a grown man.
That statement makes no sense to me you wrote, none. People usually speculate without believing. That’s like what speculate means.

 

[ZeeOSix]

That statement makes no sense to me you wrote, none. People usually speculate without believing. That’s like what speculate means.

Like I said in post 47, people mostly speculate in the direction they believe is true, even when there's data to show their speculation is false or inaccurate. That forms a misconception in their mind that's hard to change.

 

[kimmillard1]

Nice big holes on Pentius.

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This is more like it!!