August 17, 2018

What function does the wire-backed media provide?

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 […]
August 17, 2018

What is the efficiency rating and at what micron size?

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 […]
August 17, 2018

What is the recommended change interval?

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 […]
August 17, 2018

How does the quality of Royal Purple Extended Life Oil Filters compare with other manufacturers’?

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 […]