CF-4,CH-4,CJ-4, CI-4 15W40

Our factory specializes in manufacturing 15W-40 viscosity grade diesel engine oil, fully covering API quality specifications of CF-4, CH-4, CI-4, and CJ-4. It is precisely tailored to the lubrication needs of diesel engines in diverse scenarios, including commercial trucks, construction machinery, agricultural equipment, and industrial generators.

1. Broad Temperature Adaptability & Balanced Protection: The “15W” viscosity enables smooth startup in environments above -15°C, with good low-temperature fluidity to quickly lubricate all engine parts and reduce cold-start wear. The “40” high-temperature viscosity maintains a stable oil film during daily operation and medium-heavy load conditions (such as highway transportation, field operations), ensuring reliable protection without excessive running resistance.
2. Full-Range Quality Grade Matching:CJ-4 Grade: The latest premium grade, designed for modern high-performance diesel engines (meeting Euro V/VI emission standards). It enhances resistance to low-speed pre-ignition (LSPI), improves soot dispersion and oxidation stability, and is compatible with advanced aftertreatment systems (DPF/SCR), ideal for turbocharged direct-injection diesel engines. CI-4 Grade: Suitable for diesel engines complying with Euro III/Euro IV emissions, with strong anti-wear, anti-foam, and deposit control capabilities, perfect for medium-heavy duty commercial vehicles and construction machinery.

– CH-4/CF-4 Grades: Tailored for older diesel engines (e.g., non-turbocharged or early turbocharged models in agriculture or mining), providing reliable basic lubrication, preventing oil sludge formation, and extending engine service life.

3. Versatile Application: It works well in temperate, subtropical regions and most common working conditions, balancing protection performance and practicality, making it a “universal choice” for global diesel engine users.