Viscosity chart code#

However, this is not the same as the similar SAE system for engine oil viscosity, SAE J300. For many years now the viscosity of lubricating oils for motor vehicles has been specified almost universally by the SAE system.ДЇor automotive gear oils, the specification is referred to as SAE J306.

Viscosity chart code#

SAE established the grading system, which includes a numerical code system. As earlier mentioned, SAE stands for Society of Automotive Engineers. The higher the number, the thicker is the oil. Numbers you find on different oil cans, such as SAE 30 or SAE 10W-30, are viscosity or weight numbers that indicate the thickness of the oil. You can easily predict the behavior as well as the design of a mechanical system if you have detailed knowledge of oil viscosity. One of the factors that affect viscosity is the operating surface.

Oil viscosity differs from one lubricant to another with respect to temperature. Thicker oils have more resistance to shearing and losing film strength at higher temperatures. The higher the number, the thicker the oil and vice versa. The numbers are commonly assigned in ranges of 5, 10, 20, 30, 40, and 50. The ability to flow is most often selected by the Society of Automotive Engineers (SAE) numbers. Motor oil viscosity is a common term we need to understand completely, and it refers to the ability of an oil to flow. Oil viscosity is graded by measuring the time it takes for a standard amount of oil to flow. It changes with temperature, shear rate, pressure, and thickness. Oil viscosity is the parameter that plays an important role in lubrication.