How to Tell If the Engine Oil Needs to Be Changed?
2 Answers
Methods to determine if the engine oil needs to be changed: First, prepare a blank test paper, extract some oil from the engine and drop it onto the test paper for observation. If the oil shows layering or multiple layers, it indicates that a change is needed. Normally, fresh oil will not exhibit such layering. Fully synthetic oil is recommended to be changed every six months or 8,000 kilometers; semi-synthetic oil should be changed every 6,500 kilometers or three months. Prolonged failure to change the oil can accelerate engine wear. When purchasing engine oil, always choose the viscosity that suits your car's engine. The oil's viscosity should neither be too high nor too low. If the viscosity is too high, it will increase the resistance during engine operation, affecting the engine's power output and fuel consumption.
To determine if the engine oil needs changing, I have a few practical tips. As someone who drives frequently, I believe engine oil is like the lifeblood of a car, so regular checks are essential. First, pull out the dipstick, wipe it clean, reinsert it, and check the oil level—if it's between the marked lines, it's safe. Color change is especially critical; fresh oil is amber-colored, but if it turns black or contains metal particles, it’s oxidized and needs replacing. Rub a bit of oil between your fingers to check its viscosity—if it’s too thin or has a burnt smell, it’s degraded. Don’t just rely on the odometer; engine runtime and driving habits also affect oil life. If you frequently deal with city traffic jams, it’s best to check every 5,000 km. Always refer to the owner’s manual, as recommended intervals vary by vehicle. Once, I forgot to change it, and the engine noise became loud—definitely not worth the risk. I recommend developing a habit of checking monthly to catch small issues early.
