“I am known by my friends to have a good ear when it comes to diagnosing engine problems. I just got done changing the oil in my ’84 Bronco 351w and was getting ready to compare some numbers before and after loading in the Royal Purple. So I fired it up, and listened to it run for 30 seconds and shut it down. Oh my gawd! I am not even going to bother to compare the numbers. I could hear the change in rpm —this stuff is incredible!

I cannot believe how a smooth running engine can sound and run better, but mine does after Royal Purple. Well, gotta go change the color of all my fluids to purple!”

—Dave Madsen, customer

“I have to tell you how much my husband LOVES Royal Purple. He has it in everything we own. When he goes into the NAPA shop here in Beaumont, Texas, they address him as “Mr. Royal Purple”. Thanks for a wonderful product and giving my husband a new name.”

—Natha Charles, Beaumont, TX