Abstract: The differences in physicochemical properties and engine test performance between D1 and API CK-4 specification were compared. Furthermore, the correlation between D1 and API CK-4 specification, the applicability of RIPP C0010 diesel engine oil package technology to domestic engines were systematically analyzed based on the evaluation results of the engine tests. The results show that except for high temperature and high shear viscosity after shearing, D1 and API CK-4 specification have same physical and chemical indexes. The 4 engine tests of D1 specification can evaluate the engine oil properties, such as antioxidation, cleaning, dispersion, anti-wear performance, and so on, achieving the evaluation effect of 10 engine tests of API CK-4 specification, but it is still necessary to further improve its base oil exchange guideline and viscosity grade extension guideline. The driving test results show that RIPP C0010 diesel engine oil can meet the requirements of 60000 km oil-change cycle for heavy-duty diesel engines.

Key words: diesel engine oil, D1 specification, CK-4 specification, engine test