1.1 ,This test method covers the measurement of the yield stress and viscosity of engine oils after cooling at controlled rates over a period of 43 ,h or 45 h to a final test temperature of –,20 ,°,C or –,25 ,°,C. The precision is stated for test temperatures –,20 ,°,C and –,25 ,°,C. The viscosity measurements are made at a shear stress of 525 Pa over a shear rate of 0.4 ,s^-1 to 15 s^-1. This test method is suitable for measurement of viscosities ranging from 4000 mPa·,s to >,400 ,000 mPa·,s, and is suitable for yield stress measurements of 7 Pa to >,350 Pa.