SAE J300 Test Standard for Engine Oil Viscosity Grades

Material Testing

SAE J300 Test Standard for Engine Oil Viscosity Grades

Viscosity plays a dominant role in the selection of lubricants for engines. Engine oils must meet viscosity requirements set by a number of organizations in conjunction with major equipment manufacturers. The January 2015 revision SAE J300 viscosity table now includes two new viscosity standards SAE 12 and SAE 8.

SAE J300 Test Standard for Engine Oil Viscosity Grades

Engine oil viscosity refers to how easily the oil flows or spills at a given temperature. Lower viscosity or thin oils flow more easily at low temperatures than thicker oils with higher viscosity. Thin oils are easy to pump and help start engines quickly in cold weather. Thicker oils with high viscosity have a strong film strength to maintain metal-to-metal contact during high temperature and heavy load.

SAE J300 Test Procedures

Low shear rate kinematic viscosity (reflects the oil flow in the engine at operating temperatures around 100 °C),
High-temperature high shear (HTHS) viscosity (Test to reliably establish the balance between load-bearing lubricating film and a not-too-high viscosity to prevent engine failure and improve fuel efficiency.),
Low temperature pumping viscosity (Maximum viscosity at specified temperatures depending on oil grade.),
Low temperature starting viscosity (simulation of a cold start of an engine).

Intertek laboratory, with its professional engineer staff, provides the best service to you, our suppliers and manufacturers, with 300 years of experience, within the scope of the test standard for SAE J25 engine oil viscosity grades.

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