
If calculated by mileage, a sedan should undergo maintenance every 5,000 kilometers; if calculated by time, it should be maintained every six months, whichever comes first. Car maintenance, also known as vehicle upkeep, refers to the preventive work of regularly inspecting, cleaning, replenishing, lubricating, adjusting, or replacing certain parts of a car. Here are some details about car maintenance: 1. Car maintenance mainly includes the upkeep of the engine system, transmission system, air conditioning system, etc., aiming to keep the vehicle clean, maintain normal technical conditions, eliminate potential hazards, prevent faults, and extend the service life. 2. Minor maintenance content: Minor maintenance generally refers to the routine maintenance tasks performed at the manufacturer's specified time or mileage to ensure vehicle performance. It mainly includes changing the engine oil and oil filter. 3. Major maintenance content: Major maintenance refers to the routine maintenance performed at the manufacturer's specified time or mileage, involving the replacement of the engine oil, oil filter, air filter, and fuel filter.

The maintenance cycle for regular sedans depends on personal driving habits. Having driven for many years, I find that servicing every 6 months or every 5,000 to 10,000 kilometers is the safest approach. My car follows the owner's manual recommendations—don’t blindly follow trends, as different brands vary significantly. For example, some Japanese cars suggest servicing every six months, while German cars might recommend annual intervals. If you frequently drive in congested urban areas or poor air quality, replace the air filter and engine oil more frequently. Regular maintenance prevents engine overheating or tire wear and helps detect issues early, saving significant costs. Remember, each service shouldn’t just involve an oil change—also inspect brakes, lights, and the chassis, as these impact driving safety. Delaying too long can turn minor issues into major repairs, wasting money and posing risks. In short, develop a record-keeping habit and act when mileage or time thresholds are reached to keep your car in optimal condition.

The maintenance interval is quite flexible, depending largely on your driving habits. As a long-distance driver myself, frequent high-speed driving puts heavy load on the engine and accelerates oil degradation, so I get maintenance every 5,000 kilometers. But if you only drive short commutes with frequent starts and stops, every 7,000 kilometers might suffice. For harsh road conditions like unpaved roads, chassis inspections should be scheduled earlier. Pay attention to vehicle signals, such as unusual engine noises or sudden increases in fuel consumption, as these indicate maintenance is needed. Remember, vehicle upkeep isn't just about time or mileage—tailoring it to actual usage reduces waste. Ensure each technician checks brake discs and tire pressure to prevent accidents. Regular maintenance is cost-effective and extends vehicle lifespan.

The maintenance frequency differs between new and old cars. My car is a new sedan, requiring maintenance every 5,000 kilometers for the first two years to break it in properly, then extending the intervals as per the manual afterwards. Older cars with more wear might need oil changes as often as every 4,000 kilometers to prevent issues. I believe synthetic oil can last longer, say up to 10,000 kilometers between services for convenience. The key is to adjust based on brand differences and not overlook seasonal changes—check the coolant before winter to avoid freezing. Regularly check the oil dipstick to judge if early action is needed.


