What maintenance is required for a car at 30,000 kilometers?

[Wesley]

Generally, the maintenance items for a car at 30,000 kilometers include changing the engine oil, oil filter, air filter, fuel filter, cleaning the throttle body, replacing spark plugs, etc. Some 4S shops may recommend additional maintenance items, which car owners can consider based on their actual situation. Below are the relevant details: 1. Changing engine oil and oil filter: Replacing the engine oil and oil filter is essential. Under the harsh conditions of high temperature and high pressure in the engine, the shelf life of engine oil is significantly shortened, and its performance degrades, eventually failing to protect the engine. The oil filter prevents impurities from mixing with the oil, which can cause oxidation, leading to sludge and clogging the oil passages. The engine oil and oil filter should be replaced simultaneously. The air filter should be replaced every 10,000 to 15,000 kilometers, and the fuel filter every 30,000 kilometers. 2. Cleaning the throttle body: It is necessary to clean the throttle body at the 30,000-kilometer maintenance, but it is unnecessary before this mileage and can be declined. By 30,000 kilometers, the car has been driven for some time, and carbon deposits may accumulate in the throttle body, reducing its opening and causing unstable idling or poor acceleration. If the car owner notices a drop in power during this period, they should consider inspecting the throttle body and spark plugs during maintenance. 3. Replacing spark plugs: Spark plugs should be replaced at 30,000 kilometers if they haven’t been replaced before. While spark plugs may still function at this mileage, their ignition performance significantly declines, directly affecting the engine’s power, performance, and fuel consumption. If the car is running smoothly, replacement can be delayed by another 10,000 kilometers. 4. Other items: Besides these, the 30,000-kilometer maintenance involves inspecting and servicing dozens of items across multiple systems, including the engine, transmission, air conditioning, steering, braking, suspension, body, and tires.