This SAE Standard defines the limits to a classification of automotive gear lubricants in rheological terms only. Other lubricant characteristics are not considered.
SAE J306-2005 Referenced Document
ASTM D2983-04 Standard Test Method for Low-Temperature Viscosity of Lubricants Measured by Brookfield Viscometer*, 2024-04-18 Update
ASTM D3244-97 Standard Practice for Utilization of Test Data to Determine Conformance with Specifications
ASTM D445-04 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity)*, 2024-04-18 Update
ASTM D5293-04 Standard Test Method for Apparent Viscosity of Engine Oils Between -5 and -35176;C Using the Cold-Cranking Simulator*, 2024-04-18 Update
SAE J306-2005 history
2019SAE J306-2019 AXLE AND MANUAL TRANSMISSION LUBRICANT VISCOSITY CLASSIFICATION