Originally Posted By: ZeeOSix
Sounds like Purolator tried out cardboard end caps at one time, but obviously they probably realized it wasn't the best compared to metal end caps and now make them all with metal end caps.
Have you guys seen these short videos on Purolator's website that show that metal is better than cardboard?
Well, it's difficult to rebut that rigorous scientific study. I guess if my oil starts shooting bullets at my oil filter (?), I'll keep Purolater in mind.