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When should engine oil be changed based on its color?

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07/28/25 2:43pm

Engine oil should be replaced when it appears insufficiently clear, contains excessive impurities, or turns black. The steps for changing engine oil are as follows: 1. Remove the air filter, clean it thoroughly using compressed air from an air pump, and reinstall it; 2. Lift the vehicle, unscrew the drain plug to release the old oil, and remove the oil filter; 3. Add approximately 3.5 liters of new engine oil. The functions of engine oil include: 1. Reducing friction and high temperatures; 2. Cooling and lowering temperature; 3. Cleaning and purifying; 4. Dampening vibrations and cushioning impacts; 5. Preventing rust and corrosion. Engine oil, also known as motor lubricant, consists of: 1. Base oil: The primary component of lubricating oil, determining its fundamental properties; 2. Additives: These compensate for and improve any deficiencies in the base oil's performance.

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