How to Add Engine Oil for BMW?

[StLeilani]

BMW engine oil addition method 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 at the oil filler port for two minutes, tighten the oil drain screw after draining, and wipe it with a tissue to check for oil leakage; 3. Reinstall the protective plate and lower the car, then use a funnel to add oil at the oil filler port. The functions of engine oil are: 1. To alleviate friction and high temperature; 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.