How Much Engine Oil Should Be Added During Car Maintenance?

[PeytonRose]

During car maintenance, approximately 4 liters of engine oil should be added. The functions of engine oil are: 1. To alleviate friction and high temperatures; 2. To reduce gas leakage and prevent external pollutants; 3. To prevent contact between water, air, acidic harmful gases, and parts; 4. To buffer the pressure rise at the engine cylinder port; 5. To flush away dirt generated on the working surfaces of parts. The characteristics indicating the need for oil change are: 1. Check the viscosity of the oil—if there is no viscosity, the oil needs to be changed; 2. The oil color turns black; 3. Excessive black particles, metal shavings, or carbon deposits in the oil; 4. The oil smells abnormal. The method for changing engine oil is: 1. Lift the car, remove the protective plate, and place a container of about 10 liters under the oil drain screw; 2. Unscrew the oil drain screw, use an air gun to blow into the oil filler port for two minutes, then tighten the oil drain screw after draining and wipe it with a tissue to check for leaks; 3. Reinstall the protective plate and lower the car, then use a funnel to add oil into the filler port.