Why are Royal Purple Extended Life Oil Filters constructed with a silicone anti-drain back valve?

What function does the wire-backed media provide?
August 17, 2018
What are the beta ratios?
August 17, 2018
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.
Category: Oil Filter