Originally Posted By: Olas
Originally Posted By: ZeeOSix
^^^ Yes, according to the WIX specs, the WIX/NAPA Gold is higher efficiency (95% @ 20 microns) than the WIX XP/NAPA Platinum (50% @ 20 microns).
If you want both high efficiency and high flow, go with the Ultra or a Purolator Synthetic.
95% @ 20 Microns puts it firmly I the 'rock catcher' grade.
99% @ 9Microns is a much more acceptable figure, available in Mann filters.
95% @ 20 microns isn't really a "rock catcher", but 50% @ 20 microns is.
Can you show a link to this Mann with the 99% @ 9 microns spec?