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If it did, we would never know it. All the filters have bypass valves that open if the filter plugs.
 

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Steve, here is a link to a study made on oil filters. Read it, and likely you will go with the Pur.
Lots more filter area than some of the others, so more area will pass more junk before it plugs, even when it is finer mesh.
Still, good idea not to try to make a lifetime filter out of it.
Picture of a cut up pur at the bottom left.

http://www.calsci.com/motorcycleinfo/FilterStudy.html
 

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The old VW Beetle engines had a 'filter screen' which was a metal screen that was about equivalent to window screen. All you had to do was keep the oil changed every 3000 miles, clean the screen at the same time, and adjust the valves regularly, and the engines would run for years/miles.
Well, Phil, if you can remember that, you likely remember the bypass oil filters that did not have a filter, you just put in a new roll of toilet paper. Then, I would guess what you pulled out after 3000 miles was an oil soaked roll of toilet paper that had not filtered a thing.
 
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