Motor Oil Viscosity Grades and Viscosity Testing


The most crucial component for any vehicle to run seamlessly on the road is the engine (motor) oil. Engine oil is the lifeblood of any car’s engine.

Functions of Engine Oil

• Lubricates various internal components of the engine, prevents friction between them, and reduces their wear and tear
• Helps to prevent rust and corrosion
• Acts as a coolant and absorbs heat, thereby preventing overheating
• Cleans engine by removing sludge and soot from the engine block
• Neutralizes the acids released during the combustion process
Considering the wide range of functions performed by the engine oil, it is clear that it is an essential element of our vehicle’s engine.
Did you know that not all engines can use the same engine oil? Different engines need different engine oils in order to function optimally. In order to deliver top-notch performance and increase the longevity of your vehicle, it is important for you to select the motor oil that has the appropriate grade of oil viscosity. There is a wide range of motor oil viscosity grades available in the market and you need to choose one the proper one for your engine.

What are Motor Oil Viscosity Grades?

• The viscosity of engine oil is measured by its resistance to flow or how easily it flows at a specified temperature.
• The Society of Automotive Engineers (SAE) has established a unique coding system to grade motor oils.
• Engine oils are categorized into different grades on the basis of the oil viscosity.
• Different engine oils behave differently during changes in temperature.
• The choice of the ideal viscosity of engine oil depends on your engine and the climate in which you are driving.

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