Is Gear Oil the Same as Engine Oil?

1 Answers
LaAbel
07/24/25 4:00pm
Gear oil is not engine oil. Gear oil, also known as transmission oil, is used in automotive transmissions. It is primarily composed of petroleum lubricants, base oils, or synthetic lubricants, combined with extreme pressure anti-wear agents and oiliness agents to form a type of transmission lubricant. It is used to lubricate various gears in transmissions, reducers, and differentials to prevent gear surface wear, scratches, and sintering, thereby extending service life and improving power transmission efficiency. Engine oil, on the other hand, is used in automotive engines and is a type of engine lubricant composed of base oils and additives. Depending on the base oil, it can be classified into semi-synthetic oil, fully synthetic oil, and mineral oil. Inside the engine, oil serves functions such as cleaning, lubricating, and cooling components. It operates in high-temperature and high-pressure environments for extended periods, requiring high oxidation resistance and stronger shear resistance.
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