How many kilometers should 0w40 engine oil be replaced?
2 Answers
0w40 engine oil is a fully synthetic oil, and the replacement interval for fully synthetic oil is 10,000 kilometers. The following are specific details about fully synthetic oil: 1. Definition: To obtain higher-performance engine oil, humans have chemically synthesized various types of oil, which is known as chemically synthesized oil, or synthetic oil for short. Synthetic oil is a man-made oil produced by chemically decomposing selected natural substances and then synthesizing them with other various substances. Manufacturers produce different types of synthetic oil based on user requirements. 2. Advantages: Synthetic oil offers superior quality, ensures smoother cold starts (especially noticeable in northeastern regions), has a longer oil change interval (approximately 1.5 times or more compared to conventional lubricants), extends engine lifespan, and reduces maintenance frequency.
As a seasoned mechanic with years of experience, the replacement interval for 0W-40 engine oil typically ranges between 8,000 to 12,000 kilometers, but this depends on the specific vehicle condition and driving habits. Over time, engine oil accumulates dust, acids, and moisture, leading to reduced lubrication capabilities. Insufficient lubrication can cause internal engine components to wear and damage more easily. While full synthetic oil is more durable, frequent short-distance driving or city traffic congestion can accelerate oil degradation. Conversely, long-distance highway driving can extend its lifespan. I recommend car owners first check their vehicle's manual—German cars like BMW may recommend changes at 7,500 km, while Japanese cars like Toyota suggest around 10,000 km. Don’t just guess. Another factor is time: even if you only drive a few thousand kilometers a year, the oil should still be replaced due to oxidation and deterioration. Regularly inspect the oil’s color by pulling out the dipstick—if it appears dark and sticky, it’s a sign of degradation. In short, safety first. Timely oil changes can prevent major engine overhauls and save you significant costs.
