How Many Kilometers and Time for the Third Car Maintenance

The third car maintenance is usually performed at around 20,000-25,000 kilometers, but this is not a fixed value. This parameter is only for reference. If the car is driven less frequently, maintenance does not need to be based on the mileage. It is recommended that the owner perform maintenance at least once every six months. The specific maintenance cycle should also be determined based on the car's usage. The items for the third car maintenance include changing the engine oil, oil filter, air filter, cabin air filter, spark plugs, etc.

Generally speaking, the third car maintenance is also a routine maintenance. In addition to the regular maintenance items, some car manufacturers may add additional maintenance items because certain parts used in the car are consumables with short life cycles. Over time, these parts can affect the car's normal operation, so they need to be replaced regularly.

During car maintenance, the first step is to change the engine oil. Prolonged engine operation leads to high internal temperatures and pressure, which can significantly degrade the quality and performance of the oil.

Depending on the engine type, different types of engine oil are used. Naturally aspirated engines use semi-synthetic oil, while turbocharged engines use fully synthetic oil. There is also mineral oil, which has the shortest usage cycle compared to the other two types.

From a mechanic’s perspective, the third service is critical for catching wear before it escalates. For most petrol cars, aim for 30,000–40,000 km or two years. Diesels might stretch to 50,000 km. Focus on replacing timing belts (if applicable), brake fluid, and inspecting suspension components. A Vauxhall Corsa’s service will differ from a Nissan Leaf’s—always cross-reference the manual with actual wear.

The third car maintenance typically occurs between 30,000 to 45,000 kilometres or after 24 to 36 months, whichever comes first. Exact intervals depend on the manufacturer’s guidelines and driving conditions. For example, a Ford Focus might require servicing at 30,000 km or two years, while a BMW iX could extend to 45,000 km due to advanced engine technology.

Key factors influencing maintenance timing:

1. Manufacturer’s schedule: Check the owner’s manual for model-specific recommendations.
2. Driving habits: Frequent short trips or harsh conditions (e.g., stop-start traffic) may necessitate earlier servicing.
3. Oil type: Synthetic oil often allows longer intervals than conventional oil.

Neglecting this service risks premature wear, especially for components like brake fluid, air filters, and spark plugs. Modern cars with service indicators (e.g., Tesla Model 3) may adjust intervals based on real-time data. Always consult a certified mechanic to confirm the optimal schedule for your vehicle.