Engine oil grades explained

Engine is a complex machine with multiple moving parts that operate under a wide range of temperatures and pressure. Engine oil  provides engine protection against wear, corrosion, friction and the build up of dirt and deposits, it also transfers heat away from the combustion cycle.

When it comes to oil change you must determine which oil to use as there are as many different types of engine oil with different grades for different engines. By understanding what 5W-40 or 20W-50 actually means, you can make an educated decision when it comes to choosing the right engine oil for your car engine. Here, 'W' signifies the winter rating of the oil. The first number indicates the lubricant’s viscosity under lower temperatures. The second and higher number indicates the lubricant’s viscosity under greater temperatures. Viscosity is the measure of how easily a liquid flows. Temperature has a direct effect on oil viscosity, higher temperatures reduce the viscosity of oil, reducing its strength and lubricating properties. 

Note : Oil change frequency to be followed strictly as per the Owner's