Wix Filter/NapaGold Oil Filter vs Napa ProSelect
- Napa ProSelect uses a coil spring rather than a leaf spring; a coil spring keeps better pressure against the end cap. The ends of the coil should be bent inwards to prevent damage to the can.
- Napa ProSelect uses metal end caps rather than the fiberboard end caps.
- The filter media inside the Napa ProSelect was glued to itself, rather than crimped with a metal bracket.
- Napa ProSelect uses a phenolic resin which helps to bind the media and protect during high temperatures.
- The center tube of the Napa ProSelect filter is a spot-welded, straight seam; other brands use a spiraled center tube for better flow.
- The Napa ProSelect filter uses a rubber anti-drain back valve. The anti-drain back valve is used to prevent oil from draining back to the crankcase after shutdown. A silicone valve is less likely to break down during high heat than the nitrile rubber.
- The Napa ProSelect has fewer pleats than the NapaGold – 51 to 58.