Royal Purple Duralec Super Diesel Synthetic Motor Oil - SAE 15W40 - 1 Quart Cometic 1963-1965 GMC PB1000 Series

1963-1965 GMC PB1000 Series

1967-1968 American Motors American

1984-1990 Lincoln Town Car

Stylish Epaulets

Royal Purple Duralec Super Diesel Synthetic Motor Oil - SAE 15W40 - 1 Quart Cometic 1963-1965 GMC PB1000 SeriesRoyal 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.