This SAE Standard defines the limits for a classification of engine lubricating oils in rheological terms only. SAE 12’s KV100 limits are 5.0 cSt (minimum) and less than 7.1 cSt (maximum) the grade’s HTHS viscosity minimum is 2.0 mPas. Its high-temperature/high-shear-rate viscosity at 150C is 1.7 mPas (minimum). SAE 8 is defined as having minimum kinematic viscosity at 100 degrees C of 4.0 cSt, and a KV100 maximum of less than 6.1 cSt. The 100☌ kinematic viscosity (KV100) ranges of the new viscosity grades overlap to provide adequate formulating space for these grades. The benefit of establishing new viscosity grades is to provide a framework for formulating lower HTHS engine oils in support of the ongoing quest of Original Equipment Manufacturers (OEMs) to improve fuel economy. The J300 revision was requested by a consortium of passenger car OEMs to provide a viscosity grade lower than SAE 20. The SAE 16 viscosity grade was added to SAE J300: Engine Oil Viscosity Classification in April 2013. This revision continues the process of extending the SAE Engine Oil Viscosity Classification system to lower high-temperature high-shear-rate (HTHS) viscosities by adding the mentioned two new high-temperature viscosity grades to SAE J300 with minimum HTHS viscosities of 2.0 and 1.7 mPas respectively. SAE International has revised its SAE J300, Engine Oil Viscosity Grade Classification System, adding two new high-temperature viscosity grades - SAE 8 and SAE 12. SAE Adds Two New Grades SAE 8 and 12 to J300
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