Wix xp vrs fram ultra vrs mobil 1 filter

If you're thinking of Wix XP, Napa has the Platinum filter on sale for $6.49 this month, so it costs much less than the Ultra. Napa Platinum is Wix XP :)

One major difference is, besides the Napa sales, which include the cartridge filters, the Napa Platinum/Wix XP is made in a much wider range of applications than the Ultra.
And has significantly worse efficiency rating swhen compared to the ultra.
 
NAPA Platinum/Wix XP is a rock catcher-flow is fine, efficiency is pretty bad.
Mobil 1 is basically a synthetic blend filter, no better or worse than anything else (& Mann & Hummel makes them now:mad:)
Ultra WAS a really good multilayer full synthetic filter, but now is just a blend with some synthetic sprayed on it (flow & efficiency is unknown).
If you can find the OG Ultra, with metal mesh visible through the holes, they're still the best of this group (on par with RP, FG Stratapore, Donaldson Blue if available for your application).
 
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