How Often Should the Engine Be Cleaned?
2 Answers
Engine cleaning is recommended every 20,000 to 40,000 kilometers. The lubrication system cleaning service at 4S shops typically involves adding a cleaning agent through the engine oil filler port before an oil change, keeping the engine running for 5 to 10 minutes, and then draining it along with the old oil. During engine operation, the high-temperature working environment and the wear from relative movements and friction surfaces can affect the performance and quality of the engine oil. When the oil's performance and quality degrade, its ability to clean the engine oil passages also decreases, leading to sludge buildup in the lubrication system. In severe cases, this can even clog the oil passages. Therefore, the engine lubrication system requires regular cleaning.
As an ordinary person who commutes by car in the city frequently, I've found that there's no fixed standard for engine cleaning frequency—it depends on your driving habits. For example, since I experience heavy traffic during my daily commute, the engine idles for long periods, leading to easy carbon buildup. So, I clean it every 30,000 kilometers or once a year. When cleaning, I choose reputable shops for fuel system cleaning, which helps restore power and makes the car run smoother. If you drive more on highways or have better road conditions, you might stretch it to 40,000–50,000 kilometers. Delaying cleaning can lead to increased fuel consumption and reduced engine performance—I’ve personally experienced sluggish throttle response. That’s why regular maintenance checks are crucial; don’t skimp on them.
