The research on the bench test for evaluating the dispersancy of diesel engine oil

The aim of this paper is to develop a kind of bench test for evaluating the soot dispersancy of diesel engine oil.Taking the carbon black similar to soot as the test material,the oil's dispersancy is evaluated through the oil's viscosity change after blending the carbon black into the oil under high speed.The test result shows that the dispersancy can be differentiated among the same or different grades diesel engine oils and the different dispersants by this test method.It can be uses as a simulator for developing the high grade diesel engine oil to pass the Mack T-8 engine test for the future.