Since Mann+Hummel bought Wix, the oil filters (specifically, the NAPA Gold) have lost the coil spring keeping the guts away from the bottom of the can. M+H dumped the coil in favour of a leaf spring. I remember videos decrying oil-filter leaf springs, and one in which a new leaf-spring filter sounded like a spray-paint rattle can. (I don't recall the brand of filter.) I have used NAPA Golds virtually exclusively for a decade (discounts with my CAA card; not so with Wix). Possible anti-leaf-spring marketing snow job aside, how serious is that switch, along with the anti-drain-back mod since M+H bought Wix? I presume cheaper, stamped leaf springs help M&H brass make their boat payments on time. Since all other brands I know of (including premium, rock catchers and premium rock catchers, use leaf springs, perhaps I should switch to Fram Ultras and be done with it â€” the Purolator maker does not inspire confidence. 2011 video of an unused NAPA Gold cut open. https://youtu.be/YcJ0pp2pneY 2019 video of an unused NAPA Gold (and Platinum) cut open. https://youtu.be/dwfTC1H1poQ The 2019 Platinum certainly does not inspire confidence. As of Aug. 4, 2019, it still uses a coil spring, though that hardly negates the rest of its alleged M+H shortcomings.