The higher the thermal load, heavier the load, and higher the operating temperature of a diesel engine, the more intense the working intensity and the higher the requirements for the oil level used.

For common rail fuel injection engines with a load capacity of less than 10 tons, use CH-4 grade or above oil (suitable for naturally aspirated or low turbocharged pre ignition diesel engines), such as Jiefang 6t, Dongfeng Heavy Duty, Huanghe JN150, Steyr 9t, and Iveco 9t.

Use CCF-4 grade oil (suitable for turbocharged pre ignition diesel engines) with a load capacity of more than 10 tons, such as Steyr 10t, Mercedes Heavy Duty, Dongfeng 153, Mitsubishi 8DC8-2A, Nissan CK20G, etc.

Diesel engines produced abroad under low-speed high load and high-speed high load conditions should be lubricated with CH-4 grade oil, while turbocharged diesel engines should use CI-4 grade or higher engine oil.

CI-4 is suitable for high-speed, heavy-duty, and long-term operation of high horsepower common rail electronic injection diesel engines, especially suitable for highway driving, with good energy-saving effects, effectively preventing cylinder liner polishing, piston ring wear, and oil thickening.

When the fuel S content is less than 0.05%, choose CG-4 diesel engine oil specifically designed for low sulfur fuels. For two-stage bimetallic piston engines with higher fuel injection pressure and operating temperature, choose CI-4 diesel engine oil.

CI-4 is suitable for diesel engines with exhaust gas recirculation device (PDF) (including common rail electronic injection).

The CJ-4 is suitable for SCR engines manufactured with the latest technology for common rail electronic injection and exhaust post-treatment devices.

As the sulfur content in the diesel fuel increases by 1%, the oil used should be increased by one gear.

When fully loaded, overloaded, in poor road conditions, or towing trailers, higher grade engine oil should also be used.