What is the function of antioxidants in engine oil?

1 Answers
LeAshley
07/30/25 4:43am
The role of antioxidants in engine oil is to prevent oxidation and deterioration of the oil, thereby extending its service life. If the oil undergoes oxidation and deterioration, its lubricating properties will decline, which can accelerate engine wear. During normal engine operation, the oil forms a protective film on the surfaces of various engine components. This film prevents direct contact and friction between components while also reducing movement resistance between them. Without oil, the engine cannot function properly. During normal operation, the engine's internal temperature is very high, making it prone to chemical reactions in such an environment. Therefore, antioxidants are added to the oil to prevent oxidation and deterioration.
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