An advanced diesel engine oil meeting the latest performance specifications for this category. It is designed for use in modern American-made diesel engines, including turbocharged and supercharged engines. TURBO OIL CK-4 10W-40 helps maintain engine cleanliness, reduces deposit formation, and protects engine components against rust and corrosion. TURBO OIL CK-4 10W-40 is suitable for engines meeting Euro 4, Euro 5, and Euro 6 emission standards, helping support reduced environmental impact.