What maintenance items are required for a car with 20,000 kilometers?

[LeJonathan]

Car maintenance at 20,000 kilometers is a major service, typically the third maintenance for a vehicle. Routine items include changing the engine oil, oil filter, air filter, cabin air filter, spark plugs, etc. Here are the relevant details: 1. Replacing the engine oil and oil filter is essential. Under the harsh conditions of high temperature and high pressure inside the engine, the shelf life of engine oil is significantly shortened, and its performance deteriorates substantially. Over time, it fails to protect the engine effectively. The oil filter prevents impurities from mixing with the oil, which can cause oxidation, leading to the formation of sludge and clogging the oil passages. Both the engine oil and oil filter should be replaced simultaneously. 2. The air filter's role is to block dust and particles that the engine might inhale during the intake process. If the filter is not cleaned for a long time, it can allow dust to enter the engine, causing abnormal wear on the cylinder walls. If it wasn't replaced during the 10,000-kilometer maintenance, it must be replaced at the 20,000-kilometer service.