
Engine cleaning is generally recommended every 30,000 to 50,000 kilometers and does not require overly frequent maintenance. The reasons are as follows: 1. Most lubricants used in modern passenger cars come with built-in cleaning functions, ensuring that the engine does not accumulate sludge or only minimal amounts within a certain mileage. 2. Cleaning agents can be corrosive and may damage non-metal components inside the engine, leading to engine malfunctions. 3. If the vehicle has been driven for a long distance, cleaning the engine may result in reduced oil pressure, cylinder gasket leaks, and other issues, causing significant damage. 4. Over time, internal components wear out, and the accumulated sludge can help compensate for and repair some of this wear. If the air filter becomes clogged or accumulates too much dust, it can restrict engine airflow, allowing large amounts of dust to enter the cylinders. This accelerates carbon buildup, leading to poor ignition, reduced power, and increased fuel consumption. For normal city driving, the air filter should be inspected every 5,000 kilometers. If excessive dust is present, compressed air can be used to blow the dust out from the inside of the filter. However, the pressure should not be too high to avoid damaging the filter paper. It is important to note that water or oil should never be used to clean the air filter, as this can saturate and damage the filter element. For cleaning the combustion chamber, a specialized carbon remover can be used to soften and loosen carbon deposits on the chamber and fuel injectors, making them easier to remove. This method is highly effective, avoids surface damage to components compared to direct scrubbing, and significantly improves carbon removal efficiency.

Regarding the mileage interval for engine cleaning and maintenance, I think it depends on the specific vehicle model and driving habits. If you drive a regular sedan frequently in urban areas with heavy traffic congestion, it's recommended to perform cleaning maintenance every 5,000 kilometers. Frequent starts/stops and low-speed operation can easily lead to carbon deposits and oil sludge buildup in the engine. If not cleaned promptly, this can reduce fuel efficiency, increase vibrations, and even cause malfunctions. I usually drive gently, but last time I neglected maintenance, and at over 10,000 kilometers, the engine developed loud abnormal noises. Inspection revealed excessive sludge accumulation, resulting in costly repairs. It's advisable to refer to your vehicle's manual as requirements vary by brand, typically ranging between 5,000 to 10,000 kilometers. Owners who do more highway driving can extend the interval. Regular professional maintenance can make the engine more durable—don't wait until problems arise to address them, as that will cost more time and money.

As a seasoned driver with over a decade of experience, I'd like to share some insights: The ideal interval for engine cleaning and maintenance is typically around every 8,000 kilometers. My car is an economical small-displacement model, driven in mixed urban and suburban conditions. I take it for a thorough cleaning service every 8,000 kilometers, which includes carbon deposit removal and oil change. After cleaning, I notice smoother acceleration and slightly improved fuel efficiency. According to mechanics, if you primarily drive on highways, the interval can be extended to 10,000 kilometers. However, for frequent driving in dusty or congested areas, they recommend shortening it to 6,000 kilometers to prevent potential issues. My neighbor sticks to bi-annual maintenance and has never encountered major problems. Remember, don't delay maintenance too long – ignoring increased engine noise could lead to costly repairs. Small maintenance costs now can save big repair bills later.

How often should engine cleaning and maintenance be performed? Based on my driving experience, it's best to keep it within the 7,500 to 10,000 km range. This depends on road conditions: vehicles used mostly for short urban trips with frequent starts tend to accumulate more deposits and should be serviced earlier; those driven long distances on highways can have longer intervals. Cleaning helps prevent engine overheating or starting difficulties, ensuring safe and stable operation. Last time I drove 9,000 km without cleaning, the engine started shaking severely during the trip - I had to rush for repairs to avoid accidents. Regular maintenance also extends engine lifespan. Get it checked at least once a year - don't just rely on mileage, consider time factors for more comprehensive care.


