These new viscosity grades allow the formulation and production of lubricants that enable better fuel economy. High-Shear-Rate Viscosity, cP at 150 ☌ min. Low-Shear-Rate Kinematic Viscosity (cSt) at 100 ☌ max. Low-Shear-Rate Kinematic Viscosity (cSt) at 100 ☌ min. Low-Temperature (☌) Pumping Viscosity, cP max with no yield stress Low-Temperature (☌) Cranking Viscosity cP max. The low shear rate KV limits for SAE 8, SAE 12 and SAE 16 overlap to allow greater flexibility in lubricant design. In case of SAE 12 the low shear rate KV must be in the 5.0 - 7.1 mm 2/s range, while the high shear rate viscosity must be 2.0 mPa*s or higher. For a motor oil to meet SAE 8 requirements its low shear rate kinematic viscosity at 100 ☌ must be between 4 and 6.1 mm 2/s while its high shear rate viscosity must be at least 1.7 mPa*s at 150 ☌. The new viscosity grades are SAE 8 and SAE 12 defining new limits for future engine oils built for even better fuel economy.īoth SAE 8 and SAE 12 are operating temperature viscosity grades so they have minimum and maximum limits regarding their low shear rate kinematic viscosity at 100 ☌ and minimum limits regarding their high shear rate viscosity at 150 ☌. On Januthe Society of Automotive Engineers, better known by its acronym as SAE added two new viscosity grades to its most popular viscosity classification system defined under the SAE J 300 standard. Introducing the SAE 8 and SAE 12 Viscosity Grades
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