“I recently switched to Royal Purple from Mobil …I swore I would never use a synthetic oil, but after talking to others decided to give it a try. … O’Reillys and …a local engine builder …strongly recommended your product [so] I decided to give you a try. Since I started using Royal Purple I have improved oil pressure and my gas mileage has improved around 7 mpg.

I drive a 1989 Chevrolet C-1500 pickup with 249,000 miles, which I have owned for 11 years. … I’m planning on using your automatic transmission fluid, rear end fluid and Purple Ice. Thanks again for a great product.”

—Aaron Allen, Pampa, TX

“I replaced the Mobil 1® transmission oil in my 2001 Ford Powerstroke automatic transmission with Max-ATF and the tranny ran cooler by about 20 degrees through the mountains (179-190 degrees, previously it would get to 210).

Engine exhaust temperatures dropped 100-150 degrees (now 800-850 degrees, previously 950-1,000) when towing the 5th wheel, which weighs about 11,000 lbs. and is 32 ft. long, and gas mileage improved 2 mpg.”

—Robert D., Richardson, TX