SAEViskositätsklassen

SAEViskositätsklassen, also known as SAE viscosity grades, are a system used to classify the viscosity of lubricating oils. The system is named after the Society of Automotive Engineers (SAE) and is widely used in the automotive industry. Viscosity refers to a fluid's resistance to flow, and it is a crucial property for lubricants as it affects their ability to reduce friction and wear between moving parts.

The SAE viscosity grading system uses a two-digit code to represent the oil's viscosity at two different temperatures. The first digit indicates the oil's viscosity at 100 degrees Fahrenheit (37.8 degrees Celsius), while the second digit represents the viscosity at 210 degrees Fahrenheit (98.9 degrees Celsius). For example, a 10W-30 oil has a viscosity of 10 centistokes (cSt) at 100 degrees Fahrenheit and 30 cSt at 210 degrees Fahrenheit.

The SAE viscosity grades are categorized into different classes based on their performance characteristics. These classes include:

- SAE 5W, 10W, 20W, and 30W: These are winter grades, designed to provide good low-temperature performance.

- SAE 5, 10, 20, 30, 40, and 50: These are conventional grades, suitable for a wide range of temperatures.

- SAE 60, 70, 80, and 90: These are high-temperature grades, designed for use in engines that operate at high temperatures.

The choice of SAE viscosity grade depends on the specific application and operating conditions. For example, oils with lower viscosity grades are typically used in cold climates or in engines that operate at low temperatures, while higher viscosity grades are used in hot climates or in engines that operate at high temperatures. Additionally, oils with a wider viscosity range, such as 10W-30, provide better protection over a wider range of temperatures.