What is the replacement interval for full synthetic engine oil?

[DelJaxson]

Full synthetic engine oil should be replaced approximately every 10,000 kilometers or once a year. Full synthetic oil demonstrates excellent performance with strong oxidation resistance, allowing for a longer service interval. The functions of engine oil are: 1. To reduce friction and high temperatures; 2. To minimize gas leakage and prevent contamination from external pollutants; 3. To protect components from contact with water, air, and harmful acidic gases; 4. To cushion the pressure rise in engine cylinder ports; 5. To flush away contaminants generated on component surfaces. The steps for changing engine oil are: 1. Lift the vehicle, remove the underbody shield, and place a container with approximately 10-liter capacity beneath the drain plug; 2. Loosen the drain plug, use an air gun to blow into the oil filler port for two minutes, then tighten the drain plug after complete drainage and wipe it with a paper towel to check for leaks; 3. Reinstall the underbody shield and lower the vehicle, then use a funnel to add new oil through the filler port.