Study on the Correlation of Low Temperature Apparent Viscosity of 80W-90 Vehicle Gear Oil
In the paper,the effect of base oil on the low-temperature apparent viscosity of 80W-90 vehicle gear oil was investigated without adding a viscosity index improver,and the correlation between the physical and chemical indicators of the base oil and the low-temperature apparent viscosity of 80W-90 vehicle gear oil was studied.Thus,the changing rules of low-temperature apparent viscosity of 80W-90 vehicle gear oil are obtained and the production process control indica-tors of 80W-90 vehicle gear oil was determined to reduce the quality risk of low-temperature apparent viscosity and guide lean production.The results show that the viscosity index and density of the mixed base oil have a high correlation with the low-temperature apparent viscosity of finished products when fixed the addition amount of the main agent and the pour point depressant,which can well reflect the low-temperature apparent viscosity of the 80W-90 vehicle gear oil.
80W-90 vehicle gear oillow temperature apparent viscosityviscosity indexdensitycorrelation