Independent Articles Endorsing Royal Purple Lubricants

Many experts have put Royal Purple to the test. The articles below are but a sampling of those published about Royal Purple. All tests were done independently and without direct involvement or influence from Royal Purple.

Please note that the text from each article is exactly as it appeared in each magazine; the layout of each article has been modified to fit the layout of our website. Check back frequently for new additions.

Royal Purple Endorsements:

Articles Documenting Horsepower and / or Torque Gains:

Articles Documenting Fuel Economy Improvements:

Endorsement Using Purple Ice to Reduce Engine Heat:

Articles About How Synthetic Oil Works:

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