SAE J306

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SAE J306 is a standard that defines the viscometric properties of automotive gear oils, maintained by SAE International.[1] Key parameters for this standard are the kinematic viscosity of the gear oil, the maximum temperature at which the oil has a viscosity of 150,000 cP, and a measure of its shear stability through the KRL test.


  1. ^ "J306 Automotive Gear Lubricant Viscosity Classification". SAE International. 2017-08-14.