Royal Purple Duralec Super Diesel Synthetic Motor Oil - SAE 15W40 - 5 Gallons H761001XXL A must for the enthusiast

A must for the enthusiast

1969-1969 Plymouth GTX

Add the proven design elements of the popular Ultra series for more tunability

Water Pump Back Plate

Universal fit in sizes ranging from 32

Royal Purple Duralec Super Diesel Synthetic Motor Oil - SAE 15W40 - 5 Gallons H761001XXL A must for the enthusiastRoyal Purple(R) Motor Oil delivers superior protection and improves performance in four cycle gasoline and diesel engines. It increases horsepower and torque, saves fuels and reduces heat, wear and emissions. It has unsurpassed oxidation stability that allows for extended oil drains and fewer oil changes, which saves you time and money and reduces the impact on the environment. Royal Purple's motor oils for passenger cars and trucks are API licensed.