Pics are what I found with topic filter exactly as it was removed from the can. Other than placing element on a surface, bypass piece was untouched. Basically, I found the same as WCW with same filter application. Also, same result found on my last c&p of MP7317. Later I tried to add some pressure but didn't change result. Unlike a coil compression spring, stamped spring only has just enough pressure to hold element secure. 'For me' now seen enough of the same results to say if I was interested, I will not be purchasing an Endurance. 'In my observation', the seal area design is flawed allowing some oil bypass. Imo, one thing to get it on a lower tier Super Tech filter, another on a "premium" filter like FE. That said, should go without saying, others welcome to reach their own conclusion.
Here is the set up used.
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In the dark. At the top is the filter image, bottom is reflection of the element on counter.
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Extra pics of the FE element.
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Date code.
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As point of information, as I don't like wasting filters this only the third time since joining I've c&p an unused filter. Each time it's been to check something out of the ordinary either posted or stated. First many years ago, it was louvers on a Champ Labs Super Tech oil filter. Second, black adbv on Toyota Thai Denso OEM OF confirmed as silicone.