Question

2. Why is lubricating oil is used
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Answer 1

Answer:

It is used to reduce friction

Answer 2

Answer:

Lubricating oil, sometimes simply called lubricant/lube, is a class of oils used to reduce the friction, heat, and wear between mechanical components that are in contact with each other. Lubricating oil is used in motorized vehicles, where it is known specifically as motor oil and transmission fluid.