What maintenance should the car do for 30,000 kilometers?

The 30,000-kilometer vehicle maintenance project includes oil replacement, mechanical filter, air filter, fuel filter and throttle cleaning. Some models require 30,000 kilometers of spark plugs to be replaced, and there are required maintenance items in the maintenance manual. Some 4s shops will require other maintenance items, and the owners will consider them themselves and carry out maintenance according to the actual situation. 1. Replace engine oil filter: It is necessary to replace engine oil and engine oil filter element. Because the engine oil is in the harsh environment of high temperature and high pressure in the engine, the shelf life will be greatly shortened and the performance will be greatly reduced. Over time, it will not be used to protect the engine. In order to prevent impurities from mixing with engine oil and causing oxidation, the oil filter element produces colloid and sludge to block the oil circuit. Replace oil and oil filter at the same time. 2. Replace the air filter every 1- 1.5 million kilometers, 3. Replace the fuel filter every 30,000 kilometers. 4. Cleaning the throttle: The car needs to clean the throttle for 30,000 km maintenance, and it is not necessary to do it before 30,000 km, so you can refuse. The vehicle travels for at least 30,000 kilometers for a period of time. At this time, there will be more carbon deposits at the throttle, which will lead to a smaller throttle opening, and then there will be phenomena such as unstable idle speed and weak acceleration. If the owner feels that the power of the vehicle is declining during this period, then the throttle and spark plug should be considered when maintaining. 5. Replace the spark plug: 30,000 kilometers to replace the spark plug needs to be replaced, provided that it has not been replaced before. The spark plug has not completely lost its function at 30 thousand kilometers, but the ignition performance of the spark plug has been greatly reduced, which directly affects the power, performance and fuel consumption of the engine. If you think the vehicle is running well, you can extend 10000 km. 6. Other projects: 30,000 km maintenance In addition to these projects, it also involves the inspection and maintenance of dozens of projects such as engine, gearbox, air conditioning system, steering system, braking system, suspension, body and tires.