January 21, 2019


We put horsepower claims from Royal Purple and K&N filters to the test.
January 21, 2019

Eight Ways to Beat the Heat

Good advice for keeping yourself and your car cool under pressure.
September 4, 2012

Hot Rod Quick Test: Purple Ice

With Purple Ice, the temperature reached 210 degrees...but even after 56 minutes of running and then under a strong load, it did not exceed 210 degrees.
January 26, 2012

Handy Test – Maxfilm

Maxfilm is a high-strength synthetic lubricant that loosens rusted parts
January 26, 2012

Handy Test – HP 2-C

HP 2-C Engine Oil a high performance engine oil recommended for use in
January 26, 2012

Handy Test – API-Licensed Motor Oil

Because Royal Purple adheres to engine surfaces after shutdown, it provides protection during startup.
January 26, 2012

Gardening Test – HP 2-C

Royal Purple HP 2-C is a high-performance engine oil that improves engine performance and reduces wear.
January 26, 2012

Garage Test – UPG

A high performance, multi-service, aluminum-complex, synthetic grease, which significantly increases bearing life and equipment reliability.
January 26, 2012

Garage Test – Purple Ice

Purple Ice is a high performance, synthetic, radiator coolant additive for both gasoline and diesel engines.
January 26, 2012

Garage Test – Max-Tuff

Max-Tuff is an ultra-tough, synthetic lubricant designed for use in reassembling repair
January 26, 2012

Garage Test – API-Licensed Motor Oil

Improve engine performance and protection, reduce emissions and increase fuel economy.
January 17, 2012

Road Test – Max-Cycle motorcycle motor oil

Greater wear protection, rust / corrosion protection, clean and efficient engines and better overall performance.