FAQs

Yes. All Royal Purple premium oil filters are compatible with both types of motor oils.

Royal Purple filters meet or exceed original equipment manufacturers’ requirements. All new car warranties remain in effect when using Royal Purple Filters.

Royal Purple premium filters use 100% synthetic micro-glass media for superior particle removal with 99% filtration efficiency at 25 microns and larger, and 80% of particles 10 microns and larger.

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

The wire backing is to support the filtration media. This further reduces the chance that the filter media could collapse. The use of stainless steel wire provides a strong, durable, AND low restriction way to provide the support.

The silicone anti-drain back valve prevents dry starts by preventing oil drain-back during shutdown. Silicone outperforms and outlasts standard rubber in both extreme cold and hot oil temperatures.

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.)