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Is It Harmful to Mix Different Types of Engine Oil?

1 Answers

DiAliyah

07/29/25 10:41pm

Mixing different types of engine oil may result in turbidity. Since different brands and grades of engine oil contain different chemical additives, these chemicals may react with each other when mixed, reducing lubrication effectiveness and potentially forming acidic or alkaline compounds that accelerate the corrosion of engine components. Below is relevant information about mixing oil products: 1. Similar Quality: The quality of similar products is generally comparable, or when high-quality oil is mixed with low-quality oil, it can still be used as low-quality oil; 2. Similar Viscosity: Adjust the physical and chemical properties of the oil, such as viscosity, to allow mixing different grades of the same oil product. 3. Additives: For different types of oil, if it is known that neither of the two mixed oils contains additives, or one does not contain additives, or both contain additives but do not react with each other, they can generally be mixed. However, the quality of the superior oil will be reduced after mixing.

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