So apparently the flaw is not the specific to Endurance bypass design. I had some Purolator Techs sitting around the garage and I performed the flashlight test. I'm not sure how reliable of a test the flashlight test really is?!
This Purolator Tech is TL14610 which fits the same application as Fram Endurance 7317 which is being discussed in the other thread.
This Purolator Tech is TL14610 which fits the same application as Fram Endurance 7317 which is being discussed in the other thread.