Is Car Maintenance Based on Time or Mileage?
3 Answers
Car maintenance is determined by whichever comes first between time and mileage. Car maintenance refers to the regular inspection, cleaning, replenishment, lubrication, adjustment, or replacement of parts related to the vehicle. Currently, the scope of car maintenance mainly includes the engine system, transmission system, air conditioning system, cooling system, fuel system, power steering system, etc. The purpose of car maintenance is to eliminate potential hazards and extend the service life of the vehicle. Car maintenance can be divided into minor maintenance and major maintenance. The interval for minor maintenance depends on the type of engine oil used, while major maintenance can be referenced from the maintenance manual provided by the manufacturer when purchasing the car. Minor maintenance is a routine service that primarily involves changing the engine oil and oil filter. Engine oil can be categorized into mineral oil, semi-synthetic oil, and full-synthetic oil. If you use mineral oil or semi-synthetic oil, the maintenance interval is typically 5,000 kilometers or six months. If you use full-synthetic oil, the maintenance interval is around 8,000 kilometers. Major maintenance involves more inspection items, conducting a comprehensive check of the vehicle, including the engine, transmission, air conditioning system, fuel system, etc.
I think this depends on the specific maintenance item. For things like oil changes, the manufacturer's manual usually specifies both time and mileage indicators - whichever comes first requires service. Even if you don't drive much, engine oil gradually oxidizes and deteriorates. However, wear items like brake pads mainly depend on actual wear condition. I've seen many cars that only drive 5,000 kilometers a year and don't need brake pad replacement at all. If you're unsure, just check the owner's manual - it clearly outlines everything based on vehicle usage conditions. Last time I helped a neighbor check his car, his pickup truck that frequently operates at construction sites already met the oil change standard in just eight months.
Based on my years of experience interacting with car owners, most people prioritize mileage. However, many overlook a crucial factor: time. Especially for fluids like brake fluid, which easily absorbs moisture, even if you've only driven 10,000 kilometers in two years, it should still be replaced—after all, excessive water content can affect braking performance. Rubber components like wiper blades and belts are even more obvious; they naturally age and crack over time. Once, I encountered an owner who hadn't changed the coolant for two years, and the water pump ended up rusting solid. So, my advice is to refer to the manual while also checking key items at least every six months for added safety.
