What is the method for extracting excess engine oil?

[DiMiles]

The method for extracting excess engine oil is: Remove the drain plug and directly drain it from the bottom. The functions of engine oil are: 1. To reduce friction and high temperatures; 2. To minimize gas leakage and prevent external contaminants; 3. To prevent contact between water, air, acidic harmful gases, and engine components; 4. To cushion the pressure rise in the engine cylinder; 5. To clean dirt generated on the working surfaces of components. Signs that indicate the need for an oil change include: 1. Checking the oil viscosity—if there is no viscosity, the oil needs to be replaced; 2. The oil color turns black; 3. Excessive black particles, metal shavings, or carbon deposits in the oil; 4. Checking whether the oil smells normal.