
A car requires a major at around 40,000 kilometers. The maintenance typically includes: replacing engine oil, oil filter, air conditioning filter, fuel filter, transmission fluid, brake fluid, etc., and requires a full vehicle inspection. If the car is used normally but fuel consumption suddenly increases, it may be necessary to consider replacing the spark plugs. Car maintenance refers to the preventive work of regularly inspecting, cleaning, supplying, lubricating, adjusting, or replacing certain parts of the car, also known as car servicing. Modern car maintenance mainly includes the maintenance scope of the engine system (engine), transmission system, air conditioning system, cooling system, fuel system, power steering system, etc. The purpose of car maintenance is to keep the car clean and tidy, maintain normal technical conditions, eliminate hidden dangers, prevent failures, slow down the deterioration process, and extend the service life.

As a frequent driver, I've found that major is typically recommended between 30,000 to 50,000 kilometers, but it really depends on your car model and personal driving habits. For compact cars I've driven like the Toyota Corolla, the manual suggests a major service every 30,000 km, including oil changes, brake pad inspections, and tire wear checks. However, if you drive an SUV frequently on highways or have a gentle driving style, you can delay it to 50,000 km. In city driving with frequent traffic jams or hard braking, parts wear out faster, so it's better to do maintenance earlier to prevent minor issues from turning into major repairs. I also recommend keeping simple records of your car's condition during each minor service - if you notice sudden increases in fuel consumption or frequent strange noises, get it checked immediately. Major maintenance isn't just about saving money, it's crucial for safety. Don't delay it too long and compromise driving safety - just find a reliable repair shop for regular maintenance.

Having been tinkering with DIY car repairs for several years, I've found that major is typically due around 40,000 kilometers. Don't just rely on manufacturer recommendations - actual inspections are more reliable. Key components like transmission fluid, spark plugs, and air filters need replacement every 40,000 km, otherwise you'll see performance degradation and increased fuel consumption. Driving conditions matter too - frequent mountain driving or heavy loads mean shortening intervals to 30,000 km, while mostly highway driving can extend to 50,000 km. My advice: pay attention to early warning signs like sluggish acceleration or warning lights, and act immediately. Regular basic tool checks of braking systems and fluids help control major maintenance costs by preventing excessive part deterioration and unnecessary expenses.

Major intervals prioritize safety every 30,000 kilometers, with brake fluid and cooling system checks being particularly critical. Before long-distance driving, ensure normal brake response to avoid hazards. In humid environments, change antifreeze frequently to extend lifespan. Even if the mileage hasn't been reached, accidents, impacts, or oil leaks warrant a lift inspection. Maintain tire balance and chassis stability to reduce unexpected risks.

Considering cost efficiency, a major is appropriate around 40,000 km. For regular sedans, it can be postponed to 50,000 km but with higher risks. Opt for economical solutions like switching to synthetic oil for better durability. For frequent short-distance city driving, reduce the interval slightly to protect the engine. Choose professional small shops for better cost performance—don’t just focus on brands to avoid unnecessary maintenance waste.

Many people mistakenly believe that a major is only needed at 60,000 kilometers, which is too late. My experience suggests that 30,000 to 40,000 kilometers is the standard point. When engine noise increases or idle becomes unstable, inspect immediately. Don't delay changing the transmission fluid and differential oil when it's time. After the first maintenance of a new car, proceed with major maintenance on schedule. Don't just focus on saving money, as it may lead to overall performance degradation and affect the driving experience.


