PSO DEO 8000 (15W-40)-4L is a robust heavy-duty engine oil designed to deliver dependable protection and performance for diesel engines working under demanding road and load conditions. It meets the API CI-4 service category, providing excellent wear resistance, soot control, and thermal stability to help extend engine life. Formulated to maintain strong oil film strength and reduce deposits, this oil supports reliable operation and durability across a wide range of temperatures.