Can engine oils of different brands be mixed?

1 Answers
MacNoah
07/29/25 8:53pm
Engine oils of different brands cannot be mixed. Engine oils from different brands and grades are formulated with various additives based on the working characteristics of different engines and the requirements of their operating environments, resulting in differences in viscosity, anti-wear properties, corrosion resistance, anti-knock performance, and volatility. Mixing them may degrade the oil's performance and even cause damage to the engine. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. It is often referred to as the 'blood' of a car. Engine oil consists of two main components: base oil and additives.
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