How often should the engine oil be changed?

[IrisLee]

Generally, the vehicle manual recommends changing the oil every 4000 or 6000 kilometers. Here are the impacts of not changing the oil regularly: 1. If the car does not change the oil for a long time, it will cause the oil to become ineffective and deteriorate. The oil will not only fail to lubricate and protect, but will also increase wear and damage to the components. 2. The sealing effect is reduced. High-quality oil with appropriate viscosity can effectively block the gap between the cylinder block and the piston, preventing gas leakage. If the oil is not changed for a long time, it will become watery and lose its sealing effect. 3. The cooling effect is reduced. The heat absorption and thermal conductivity of oil are much higher than that of water. If the oil deteriorates severely, the heat dissipation function will be greatly reduced. 4. If the oil is not changed for a long time, a lot of impurities will precipitate, such as large particles of iron filings and dust. This is not only a problem of wear but also of corrosion of internal components.

[BrantleyMarie]

Oil changes depend on your car's condition and driving habits. I've driven many cars, and conventional mineral oil usually needs replacement every 5,000 kilometers or six months. If you frequently drive on highways or get stuck in traffic, wear and tear accelerates. Semi-synthetic oil can last up to 7,500 kilometers, while full-synthetic can exceed 10,000 kilometers. Also consider environmental temperatures—hot climates require more frequent changes. Don’t just rely on mileage; regularly check the dipstick for color and viscosity. If the oil appears black or overly thin, it’s time for a change. In short, I recommend checking the maintenance manual—don’t push it. Regular upkeep extends engine life. Otherwise, worn-out parts can lead to costly repairs. Paying attention to these small habits saves money and ensures peace of mind.

[RosalieAnn]

Having driven for over a decade, I never procrastinate on oil changes. Every 5,000 kilometers or six months, I make sure to visit the shop on time for an oil replacement. Driving in the city with frequent traffic jams puts more load on the engine, and the oil consumption is faster; driving in rural areas is more relaxed and can stretch the interval a bit. Good oil like full synthetic can go up to 10,000 kilometers between changes. I even bought a small oil testing tool to check monthly—if it's sticky or has metal shavings, I change it immediately. Don’t wait for the warning light; by then, it might already be harming the engine. Developing good habits keeps the car running smoothly and safely. With proper maintenance, even a ten-year-old car remains reliable. Remember to replace the oil filter during oil changes—don’t skimp on that small expense; protecting the engine is always worth it.

[VonLane]

If safety is a priority, never delay oil changes. Without proper lubrication, engine parts will overheat due to friction, potentially causing breakdowns or even major accidents. I generally recommend regular oil changes every 7,500 kilometers or annually. Address low oil levels, darkened oil, or moisture contamination immediately. Frequent city driving with repeated starts consumes more oil. Synthetic oils allow longer intervals, but always use the specified grade. Proper engine maintenance prevents headaches—don't wait for warning lights. Safety first is timeless advice.