What is the function of engine oil in a combustion engine?

Exploring Engine Oil Types – Carisma Cars

PURPOSE AND FUNCTION Internal combustion engine is either gasoline or diesel design. They are different because of the method used for burning the fuel. - ppt download

Energies, Free Full-Text

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5 main functions of engine oil. Automobiles can be anyone's best

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5 main functions of engine oil. Automobiles can be anyone's best