Plateau Field Test of Diesel Engine Oils with Different Viscosity Grades

The degradation of SF/CD 0W/30, CD5W/30 and SF/CD 15W/40 general engine oils has been investigated by Plateau field test with STYER 91 trucks. The experimental results have shown that on the Plateau viscosity grade of the oil hardly impacts on its service performances, the higher viscosity grade oil SF/CD 15W/40 degrades faster than the lower viscosity grade oils SF/CD 0W/30 and CD5W/30.