What are the signs that a car needs an oil change?

[EmilyLee]

The signs that indicate an oil change is needed are as follows: 1. Increased engine noise during operation. 2. Symptoms of reduced engine power and sluggish acceleration. 3. The oil turns black and contains impurities. 4. The oil emits a foul odor; if the oil deteriorates, it will have a strong, unusual smell. Additional information: When changing the oil, it is best to replace the oil filter as well. The oil filter's function is to trap impurities in the oil. If not replaced promptly, the accumulated impurities can cause blockages. In mild cases, this can lead to insufficient oil pressure and poor lubrication of mechanical components, while severe cases can result in excessive engine wear.