August 17, 2018

How many miles can I go between oil changes?

Royal Purple® suggests adhering to manufacturer’s recommendedoil change intervals for vehicles under warranty. Vehicles that are no longer under warranty can frequently double or triple the […]
August 17, 2018

What viscosity is recommend for motorcycles?

Follow the manufacturer’s recommendations regarding viscosity. Most manufacturers recommend a 10W-40 for 4-cycle, liquid-cooled motorcycles. Air / oil cooled motorcycles typically specify a 20W-50. Check your […]
August 17, 2018

What are the beta ratios?

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 […]
August 17, 2018

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

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 […]