Originally Posted By: ZeeOSix
... But the filter models that started tearing were never down sized. Brittle media and large pleat spacing near the seam was the problem.
I knew you'd be along with that comment, which is why I said "... one reason ... ." Over its 33 years, I had to keep downsizing filters used on my Mazda, as the older, larger versions disappeared. Unfortunately, I was lazy and didn't cut open the last few Purolators, so don't know whether they tore.