Engine Oil performs many important functions. Few important things that Engine Oil does :
As a lubricator: It lubricates moving parts that would otherwise rub directly against each other, protecting them from excessive wear.
As a Friction Reducer: It reduces friction between moving parts, allowing them to work more smoothly and efficiently.
For a engine to function effectively, correct lubrication of engine is necessary
Frequent oil check is required to ensure the life of the engine to preserve long time.
Symptoms to change the Engine Oil:
if the color of oil is changed to thick black and gritty
if the engine sounds noise
if the level of oil drops down during checking is found
if the warning signal is on
Engine oil needs to be changed if any of the above symptoms are found.