Originally Posted By: gfh77665
Originally Posted By: Nick1994
Originally Posted By: Merkava_4
Originally Posted By: ZeeOSix
The NAPA Platinum is the same as the WIX XP.
Isn't there something you want to add to that ?
THE FILTERING EFFICIENCY IS 50% AT 20 MICRONS
And, the flow is EXCELLENT. All filters are a trade off. You can have extreamly high efficiency at the COST of reduced flow and lower holding capacity, OR you can have EXCELLENT flow and lower efficiency with GREAT holding capacity. You choose.
Only time you might see reduced flow is if the oil pump is in pressure relief, which could only happen at high RPM with pretty cold oil.
A filter like the Ultra which is basically twice as efficient has great flow and holding capacity ... so using a filter like an XP doesn't get you anything really.