Wix Filter/NapaGold Oil Filter vs Mighty

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  • Mighty uses a leaf spring rather than a coil spring; the leaf spring must always seat properly onto the end cap. Additionally, a leaf spring can bend under high pressures.
  • Mighty uses metal end caps rather than the fiberboard end caps.
  • The filter media inside the Mighty was glued to itself, rather than crimped with a metal bracket.
  • Mighty uses a phenolic resin which helps to bind the media and protect during high temperatures.
  • The center tube of the Mighty filter is spiraled for better flow; other brands use a straight tube with spot welds.
  • The Mighty 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 Mighty was one of the shortest filters.
  • Excessive glue was found where the pleats meet the end caps.
  • We found rust on the end caps.
  • The Mighty had a decent amount of pleats, however we found large gaps between some of those pleats.