Royal Purple High Performance Synthetic Motor Oil - SAE 5W30 - 5 Gallons Wall Mount Mirrors 1999-2009 GMC C6500 Topkick

1999-2009 GMC C6500 Topkick

Must have substantial airflow upgrades

50 thread size

1961-1963 GMC 2500 Series

Royal Purple High Performance Synthetic Motor Oil - SAE 5W30 - 5 Gallons Wall Mount Mirrors 1999-2009 GMC C6500 TopkickRoyal 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.