The results indicate that metal treatment may increase low-temperature pumping viscosity, results in the formation of more carbon deposit and lacquer film. Metal treatment ( MT) may cause negative effect to the engine. 结果表明,金属处理剂MT会增加润滑油的低温泵送粘度,也会导致积炭和漆膜的增加,会对发动机的使用带来不良影响。