How Often Should the Engine Fuel System Be Cleaned?
2 Answers
Engine fuel system cleaning is recommended every 30,000 to 40,000 kilometers. Vehicle owners can adjust this interval based on their driving environment, road conditions, frequency of use, and local fuel quality—especially if carbon deposits tend to form easily. If the fuel system is not cleaned for an extended period, carbon deposits and sediments can clog the fuel injector needle valves and valve orifices, impairing the performance of the precision components in the injection system. This may lead to poor fuel spray, inadequate atomization, or even complete failure to inject fuel. Such issues can result in unstable idling, increased fuel consumption, sluggish acceleration, and difficulty starting the engine. Methods for cleaning the vehicle's fuel system include: 1. Directly adding fuel system cleaner to the fuel tank; 2. Using an "IV drip" method—hanging a bottle-shaped tool above the engine and introducing the cleaning agent through a tube into the engine to remove carbon deposits; 3. Some systems can be cleaned using a no-disassembly cleaning machine.
As a veteran driver with over 10 years of experience, I generally recommend getting an engine fuel system cleaning every 30,000 kilometers or every two years. Since I mostly drive in the city with frequent stop-and-go traffic at red lights, my car tends to accumulate carbon deposits. After a while, you'll notice the accelerator feels heavier and acceleration isn't as smooth. After cleaning, it runs much more smoothly and even saves some fuel costs. However, the frequency really depends on your driving habits – if you do more highway driving, you can extend the interval. If you use low-quality gasoline or often idle your car, you'll need more frequent cleanings. Don't wait until the engine starts shaking or fuel consumption noticeably increases before regretting it. Personally, I follow the odometer reminders for maintenance – regular cleaning helps maintain engine health.
