CASTROL GTX 15W-40 is a high-quality conventional motor oil formulated with advanced additive technology. It provides excellent protection against engine sludge, deposits, and viscosity breakdown, even under demanding driving conditions. This oil is engineered to extend engine life by providing superior lubrication and wear protection. Its robust formulation helps maintain engine cleanliness and performance over extended drain intervals. Suitable for a wide range of vehicles requiring a 15W-40 viscosity grade, CASTROL GTX ensures your engine runs smoothly and efficiently.