For engines with over 75,000 miles. Superior oil burn-off protection. Castrol GTX High Mileage provides superior protection against oil burn off. It's a fact, as your engine ages, it's performance decreases and oil break down faster. Over time seals deteriorate, gaskets become brittle and oil consumption increases all leading to reduced engine performance. Castrol GTX High Mileage help extends the life of your engine. How Castrol GTX High Mileage gives you an added level of protection: Utilizes special base oils to provide superior protection against oil burn-off compared to leading oils. Contains seal conditioners that provide added protection and help reduce leakage. Contains proprietary additives that provide superior protection from wear and harmful deposits in higher mileage engines. Reduced deposit formation to minimize compression loss and maximize engine performance. API Service SM, SL, SJ. Made in the USA from domestic and imported components.