Does the car need maintenance if it hasn't reached the mileage but the time is up?

[SanLuna]

Does the car need maintenance if it hasn't reached the mileage but the time is up? Whether a car needs maintenance depends on two conditions: one is mileage, and the other is time. The condition that comes first is the determining factor. Strictly speaking, as long as either the mileage or time condition is met, the car should undergo maintenance. Car maintenance refers to the preventive work of regularly inspecting, cleaning, supplying, lubricating, adjusting, or replacing certain parts of the car. Car maintenance mainly includes the maintenance of the engine system, transmission system, air conditioning system, etc. The purpose is to keep the car clean, maintain normal technical conditions, eliminate hidden dangers, prevent failures, slow down the deterioration process, and extend the service life.

[Samuel]

I've been driving for over a decade and always emphasize the importance of time-based maintenance, even when the mileage hasn't been reached. This is because engine oil oxidizes and deteriorates over time, absorbing moisture which significantly reduces its lubricating properties—a direct threat to safety. If not changed for extended periods, internal engine corrosion intensifies, potentially leading to sudden engine stalls or brake failures. Especially in dry northern regions, moisture accumulates faster, and once lubrication declines, wear accelerates. Regular maintenance ensures smooth driving and protects engine components like the radiator. I've seen friends delay maintenance and end up spending thousands on major repairs—the risks are substantial. So, no matter how little I drive, I strictly follow the manual's recommended maintenance schedule without taking chances. This money is well spent.

[Hector]

As an average office worker, I prioritize cost-effectiveness in car maintenance. Timely upkeep is always a worthwhile investment. Even with low mileage, engine oil degrades into acidic substances over time, corroding parts. Minor issues can escalate into major repairs, like engine seizure costing tens of thousands to fix. Compared to the few hundred dollars saved by delaying oil changes, proper maintenance saves significantly in the long run. In humid southern regions, rust develops more easily. Scheduled maintenance prevents breakdowns while improving fuel efficiency. My neighbor delayed servicing and ended up spending heavily to repair a broken drive belt. Developing the habit of regular fluid and filter checks extends vehicle lifespan while saving money.

[RonanMarie]

With a little knowledge about cars, I know that timely maintenance cannot be ignored. Engine oil exposed to air oxidizes and absorbs moisture, forming acidic substances that corrode engine components, leading to lubrication failure and increased wear. Even if the car isn't driven, parts like belts and rubber hoses can age. Maintaining small maintenance intervals, such as changing the oil every six months, ensures proper lubrication. I always check the manual for reminders—simple and effective, avoiding complex failures.