With upgrading of national emission regulations for light trucks in the logistics and transportation industry,the light truck vehicles applying technologies such as diesel particulate filter(DPF)and exhaust gas recirculation(EGR)are in-creasing gradually.Application of engine post-treatment systems requires high performances of engine lubricant.In this study,the bench performance requirements of API CK-4 lubricant and the differences with Cl-4 lubricant performance were introduced,and application of CK-4 5W-40 diesel engine oil in light trucks was studied.The results show that CK-4 5W-40 on light truck vehicles installed with DPF can run 30,000 km when it uses CK-4 5W-40 diesel engine oil,which reduces vehicle operation and maintenance costs effectively in the logistics and transportation industry.
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