Two purolator boss PBL22500 filters, one with bad louvers one with good, notice the difference to the appearance of the media from the pressure created
Yes, both off a 2012 explorer with around 5k both times. Mobil 1 5w-20So, both filters run identical ocis on same the engine, same oil viscosity with same or very close driving/use profile type, ie highway vs local short tripper? Personally, I'd like to see pics of the louvers with the media removed and flashlight taken to them.
Just curious, were the louvers not viewable before purchase and/or use?
Yes, both off a 2012 explorer with around 5k both times. Mobil 1 5w-20
Dang looks like QC is working from home these days.Here is another recent Purolator Boss.. to think this stuff is clearing QC
So one has been sitting around for a while and the other recently removed? I ask all the questions because you reached the conclusion that media appearance is because of the louvers. Point is there's many variables in that could account for its appearance. To me the media on one looks like it's been subjected to more short trip moisture cycles. Or, 'maybe' just sitting around longer.Yes, both off a 2012 explorer with around 5k both times. Mobil 1 5w-20
Yes, both off a 2012 explorer with around 5k both times. Mobil 1 5w-20So, both filters run identical ocis on same the engine, same oil viscosity with same or very close driving/use profile type, ie highway vs local short tripper? Personally, I'd like to see pics of the louvers with the media removed and flashlight taken to them.
Just curious, were the louvers not viewable before purchase and/or use?
first photoThe louver quality on the second one is not great. Which one had the wavy media? Thanks for posting the comparison.
I don't think the difference in the louvers effected how the media looked after use. The dP across the media is going to be based on the media, not the louvers. If louvers, holes or an Ecore center tube effected the pressure distribution on the media enough to matter, we'd see a distinct connection between visual media look and the center tube design. But there is no evidence to support that. Center tubes with holes can show perfectly straight pleats, just like with a filter with louvers or an Ecore center tube.Two purolator boss PBL22500 filters, one with bad louvers one with good, notice the difference to the appearance of the media from the pressure created.
Not really, as explained above - that's a misconception. The difference in dP (ie, differential "back pressure") between those two center tubes in post 1 isn't going to be much. Those louvers in post 1 aren't nearly as bad as some seen. Neither are choked down much differently. The 2nd photo in post 1 looks to have much more "ragged" looking louver slits, but about opened up the same as in photo 1.Definitely a lot of back pressure going on here. Less opened up louvers leads to wavy pleats
A starting point would be cutting the used filters down to the tube.It's easy enough to judge how open or closed louvers are by just looking down the center tube at the right angle with a good strong LED flashlight. I get the best visual by looking at the openings down inside the center tube where the louver openings are. Besides, you can't look at them from the backside until the filter has already been ran. Verify they are opened enough before buying or installing the filter.
Pretty easy to tell which one to use and which one not to use.
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Not a scientific conclusionDefinitely a lot of back pressure going on here. Less opened up louvers leads to wavy pleats
ThisAll of these types of posts should be taken with the media cut away and looking through the louvres in line with the widest view.
That is NEVER when the filter is together or only the can is cut.
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