
Major refers to the routine maintenance performed at the time or mileage specified by the manufacturer, which includes replacing the engine oil, oil filter, air filter, and fuel filter. In addition to replacing the engine oil and oil filter, major maintenance also includes the air filter and fuel filter. Here is the relevant information: Air filter: During operation, the engine needs to draw in a large amount of air. If the air is not filtered, the dust in it will accelerate the wear of the piston group and cylinder. Larger particles entering between the piston and cylinder can also cause severe "cylinder scoring" phenomenon. The function of the air filter is to filter out dust and particles from the air, ensuring that sufficient and clean air enters the cylinder. Fuel filter: The function of the fuel filter is to provide clean fuel to the engine by filtering out water and impurities from the gasoline. This optimizes engine performance and also provides the best protection for the engine.

When doing DIY car , I found the Audi A6 schedule quite manageable. After the first oil change at 10,000 km, perform minor maintenance every 10,000 km. The major service at 40,000 km requires checking air filters and brake fluid - I recommend monitoring oil consumption rather than waiting for alerts. Delaying maintenance increases carbon buildup and fuel consumption, while timely part replacement extends engine life. The manual contains detailed itemized checklists, though actual intervals may vary based on driving habits.

From a cost-saving perspective, the detailed breakdown of A6 maintenance intervals is as follows. The first maintenance at 10,000 kilometers is relatively low-cost, with minor maintenance every 10,000 kilometers costing a few hundred to a thousand yuan. The major maintenance at 40,000 kilometers is more expensive, including component replacements. If I drive more in the city, I check earlier; if I drive more on highways, maintenance can be slightly delayed. Delaying maintenance may damage the engine and lead to higher repair costs, while replacing new parts saves long-term expenses. The manual-recommended frequency suits most road conditions, and fine-tuning based on driving habits can be more economical.


