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Napa Wix
Nafa Baldwin
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Wix Filter/NapaGold Oil Filter vs WIX


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Obviously the Wix and the NapaGold filters are identical, except for the weight which could be attributed to the glue that hold the pleats to the end caps.

  • Wix/NapaGold 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.
  • Wix/NapaGold uses metal end caps rather than the fiberboard end caps.
  • The filter media inside the Wix/NapaGold was glued to itself, rather than crimped with a metal bracket.
  • The Wix/NapaGold filter has a phenolic resin which binds the media together while still keeping them separated for proper filtration. In addition, the resin helps protect the pleats from high temperatures.
  • The center tube of the Wix/NapaGold filter is spiraled for better flow; other brands use a straight tube with spot welds.
  • The Wix/NapaGold filter uses a silicon anti-drain back valve which is less likely to break down than the nitrile rubber valves. The anti-drain back valve is used to prevent oil from draining back to the crankcase after shutdown.

NOTES:

Wix makes the filters for Napa - therefore, a NapaGold and a Wix are identical.They are made on the same production line, only the Napa filters end up in a different packaging department.

Don’t confuse the NapaGold with the Napa ProSelect (Napa’s lower line of filters, see comparison here) – both are made by Wix, but the quality is not the same. Wix has production facilities in Poland as well; some of the European-make automotive filters come from their production plant there.