What is the most common maintenance on a car?

The most common car maintenance items focus on basic aspects such as oil and filter replacement, air filter maintenance, tyre inspection, and brake system care. As the "blood" of the engine, oil needs to be replaced regularly according to its type: fully synthetic oil is recommended to be changed every 10,000 kilometres or 1 year, while mineral oil should be changed every 5,000 kilometres. The air filter directly affects the engine's air intake quality; It is best to inspect it every 15,000 kilometres for urban driving, with replacement intervals shortened to 5,000 kilometres in dusty environments. A clogged filter can reduce fuel efficiency by over 15%. For tyre maintenance, check tyre pressure monthly (the recommended value is marked on the door frame) and rotate front and rear tyres every 10,000 kilometres to ensure even wear. Tyres must be replaced when tread depth falls below 1.6 millimeters to maintain wet-weather traction. The brake system requires brake fluid moisture testing every 2 years (replace immediately if exceeding 3%) and regular measurement of brake pad thickness. Pads thinner than 3 millimeters pose safety risks and require prompt replacement. Spark plugs have replacement intervals ranging from 20,000 to 100,000 kilometres depending on material, while batteries typically need complete replacement every 4-5 years. Owners should strictly adhere to the manual's maintenance schedule, with oil change intervals potentially reduced by 20% in hot climates.