What is the most recent diesel engine oil classification?

The most recent diesel engine oil classification is CK. This classification indicates advanced performance and is designed to provide better protection for engines that operate under high-stress conditions, including those with turbochargers and those equipped with exhaust after-treatment devices. The CK classification reflects improvements in formulation that enhance engine cleanliness, reduce wear, and improve oxidation stability.

Choosing CK signifies compliance with modern engine requirements, which emphasize longevity, efficiency, and reduced emissions. This is particularly important as emission standards have tightened, necessitating oils that can effectively protect engines while supporting their operational needs. Therefore, CK is the latest designation used in diesel engines, ensuring compatibility with the latest technology and performance standards.