How often should fully synthetic engine oil be changed?
2 Answers
Fully synthetic engine oil should be changed approximately every 8,000 to 10,000 kilometers, as it has a relatively long service life. In addition to fully synthetic engine oil, there are also semi-synthetic engine oil and mineral engine oil, which are quite common and typically have a lifespan of around 5,000 kilometers or six months. Engine oils can be categorized into gasoline-specific engine oil, diesel-specific engine oil, and universal engine oil. Engine oils have a unified representation format, and based on this format, they are also classified by grade. The number before the English letters in the engine oil model indicates the oil's fluidity at low temperatures, while the number after the letters indicates its fluidity at high temperatures.
From the perspective of a seasoned driver with over a decade of experience behind the wheel, the replacement interval for full synthetic oil is typically between 10,000 to 15,000 kilometers or once a year. However, this should be adjusted based on your driving habits. If you frequently encounter stop-and-go traffic in the city, the engine bears a heavier load, causing the oil to degrade faster. In such cases, it might be necessary to change the oil every 8,000 to 10,000 kilometers. Don’t just rely on mileage—I recommend checking the dipstick monthly to ensure the oil level is midway between the marks and that the oil remains clear and not cloudy. If you notice foam or a foul odor, take immediate action. Additionally, when using full synthetic oil, don’t forget to replace the oil filter, as it affects the oil’s lifespan. The safest approach is to combine these practices with the recommendations in your vehicle’s manual, as requirements vary by model. Don’t cut corners on maintenance to save a few bucks, as neglecting it can damage the engine. Properly maintained, full synthetic oil can also enhance engine efficiency and improve fuel economy.
