Can Different Motor Oils Be Mixed?
1 Answers
Motor oils should not be mixed. Different brands and grades of motor oils contain various additives tailored to the specific working characteristics and environmental requirements of different engines, resulting in variations 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. Here are the reasons why motor oils should not be mixed: 1. Mixing new and used oils reduces performance: Used oil contains a significant amount of oxidative substances. When new oil is mixed with used oil, the oxidation rate of the new oil increases, thereby reducing its effectiveness and service life. 2. Mixing oils can cause turbidity: Oils of different brands and grades should not be mixed. Since the chemical additives in oils vary by brand and grade, these additives may sometimes react with each other, reducing lubrication effectiveness and producing acidic or alkaline compounds that accelerate the corrosion of engine components.