How many kilometers should a car run before needing an oil change?
3 Answers
The number of kilometers a car should run before needing an oil change depends on the type of oil used, as not all oils follow the same standard. Generally, conventional oil should be changed every approximately 5,000 kilometers; semi-synthetic oil should be changed every around 7,500 kilometers; and full synthetic oil should be changed every about 10,000 kilometers. The frequency of oil changes is also influenced by factors such as driving conditions, personal driving habits, and time intervals. Engine oil consists of two main components: base oil and additives. The base oil is the primary component of lubricating oil, determining its fundamental properties, while additives compensate for and improve any shortcomings in the base oil's performance, providing additional benefits. Additives are a crucial part of lubricating oil.
I've been driving for over a decade and found that the mileage for oil changes isn't fixed or uniform—it mainly depends on your car's manual and your actual driving habits. For example, my car's manual states to change the oil every 7,500 kilometers, but since I often drive in city traffic jams where the engine runs under high load, the oil gets dirtier faster, so I change it every 6,000 kilometers. Over time, engine oil degrades, losing viscosity and turning black, which reduces its ability to protect the engine. Minor issues include higher fuel consumption, while severe cases can lead to significant wear and require major repairs. I also pay attention to temperature effects—high summer heat accelerates oil breakdown, and cold winter starts test the oil's performance. From a cost-saving perspective, synthetic oil is better—though pricier, it lasts longer, such as over 10,000 kilometers. Regularly checking the dipstick or oil color can help spot issues early. Don't ignore your car's condition—older cars or those with problems need attention sooner. In short, safety comes first—don't delay.
Although my driving experience isn't long, I was quite concerned about this when I first bought my new car. After practical testing, I feel that changing the oil every 5,000 to 8,000 kilometers is more appropriate. My weekly commute is over 50 kilometers round trip, with frequent stops and starts at traffic lights. In such conditions where oil contamination is high, changing it earlier gives peace of mind. The advantage of using synthetic oil is that it can last over 10,000 kilometers, but it depends on your driving habits—highway driving is easier on the oil, while city driving requires more frequent changes. I'm used to setting reminders in a mobile app and adjusting based on road conditions. Delaying oil changes can easily lead to engine carbon buildup or increased noise, which would be costly to repair. From an environmental perspective, it's also important—old oil is more polluting, so regular changes reduce waste emissions. I recommend new car owners check the oil quality and follow the manual's advice rather than relying solely on intuition. Developing good habits saves both money and hassle.
