Numerous independent tests document performance gains by using Royal Purple lubricants. The sampling of results below are categorized by the performance gains reported.
Tests Documenting Horsepower (hp) and / or Torque Gains:
Just In! - Drag Sport magazine:
hp gain of 2.5%
D & D Performance Enterprises:
hp gain of 1.2%, torque gain of 1.3%
Diesel World magazine:
hp gain of 3.2%
Drag Sport magazine:
hp gain of 3.2%, torque gain of 1.5%
GM High-Tech Performance magazine:
hp gain of 5.2
Horsepower TV:
hp gain of 8, torque gain of 6 ft-lbs
Horsepower TV:
In a separate test, hp gain of 2.9%
Hot Rod Magazine:
hp gain of 2.5%, torque gain of 1.5%
Hot Rod Magazine:
In a separate test, hp gain of 1.7%, torque gain of 2.0%
Hot Rod TV:
hp gain of 2.5%, torque gain of 1.5%
Oklahoma State University: diesel engine gain of 2.8% hp
Performance Auto & Sound magazine: hp gain of 3.0%
Sport Truck magazine:
gain of 13 hp
Sport Truck magazine:
In a separate test, hp gain of 5%, torque gain of 12 lb-ft
Trucks! TV:
torque gain as much as 3.5%
Tests Documenting Fuel Economy Improvements:
Diesel World:
fuel economy gain of 10% or 1.7 mpg
fordtruckworld.com:
fuel economy gain of 7.4% or 1.1 mpg
Hot Rod TV:
fuel economy gain of 23.4% city & 28.8% highway
Oklahoma State University: fuel economy gain of 4.4%
Test Documenting Reduced Engine Wear:
Insight Services:
wear reduced by 80% and oil change intervals extended from once per race to every 3 races
Tests Documenting Reduced Engine Heat:
Longview Inspection:
Max-Cycle reduced operating temperatures 24°F - 44°F
Tests Documenting Reduced Emissions:
Oklahoma State University:
diesel engine emissions reduced 22%
