Castrol® GTX® is a premium conventional motor oil that has been helping to extend engine life for over 50 years. It is specially engineered to prevent harmful build-up of sludge while protecting against new oil splatter formation better than tough industry standards.
Enhanced Strength: 3X stronger than the leading full synthetic motor oil, ensuring superior durability. Extended Oil Change Interval: Allows for up to 20,000 miles or one year between oil changes, providing convenience and reliability.