Automotive oil or motor oil has broadly three major functions namely lubricating, cooling and cleaning of the engines. While most of the automotive oils are derived from petroleum products, many others are also derived synthetically from artificially synthesized compounds. Though these synthetic counterparts score more on performance, due to the high cost involved in their extraction process, they are more expensive and hence enjoy less popularity in the automotive oil market. Thus, choosing the right kind of automotive oil for one's set of wheels is of utmost importance to keep it in good condition for years.

Functions of Automotive Oils
Lubricating: Automotive oils act as a lubricant in various kinds of internal combustion engines that are used in automobiles and other types of vehicles such as boats, lawnmowers, locomotives and aero planes. While the vehicle is in motion, some engine parts move very closely to one another.

This motion produces friction which in turn wears away much of the contacting surfaces of the engine parts. Moreover, it results in lower efficiency and increased fuel consumption. In this respect, a very thin film is produced by these lubricating oils between the contacting surfaces of the engine parts, thereby markedly reducing friction and wear.

Cooling: Automotive oils work as a cooling agent carrying away the excess heat produced due to the movements of the various engine parts.

Cleaning: Often coming with detergent additives, automotive oil helps in keeping the engine clean and oil sludge free.

Anti-oxidant: A thin coat of the motor oil on the engine surface prevents it from getting exposed to oxygen and hence works as an anti-oxidant, thereby increasing the longevity of the engine.

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