Do Royal Purple Extended Life Oil Filters meet all original equipment requirements and vehicle warranty?
Vehicles under warranty should follow the vehicle manufacturer’s recommended change intervals. For non-warranty applications, the useful life of Royal Purple premium oil filters is the life of the engine oil. Vehicles driven in severe conditions should follow the change intervals recommended in their owner’s manual; severe conditions are defined as racing or commercial applications, frequent towing or hauling, extremely dusty or dirty conditions, or excessive idling.
The efficiency of a filter is described in terms of a percentage of particles caught at a certain particle size(and larger). Using the ISO 4548-12 multi-pass filtration efficiency test, Royal Purple filters are:
-99% at 25 micron and larger
-98.7% at 20 micron and larger
-80% at 10 micron and larger
Average beta rating based on ISO 4548-12 multi-pass test methods:
B100 = 25 (at 25 or greater micron, media is 99% efficient.)
B75 = 20 (at 20 or greater micron, media is 98.7% efficient. Also considered absolute rating.)
B5 = 10 (at 10 micron or greater, media is 80% efficient.)