Standard Test Method for Measuring Viscosity of New and Used Engine Oils at High Shear Rate and High Temperature by Tapered Bearing Simulator Viscometer at 150 ,°,C
1.1 ,This test method covers the laboratory determination of the viscosity of engine oils at 150 ,°,C and 1.0·,106 ,s−,1 using a viscometer having a slightly tapered rotor and stator called the Tapered Bearing Simulator (TBS) Viscometer.2