Oil can lubricate and clean the car's start, and also prevent the engine from rusting. Therefore, owners attach great importance to the engine oil. Once you've driven 5,000 kilometers, the oil in the car engine turns black. In fact, the engine oil blackening is a normal phenomenon, in addition, frequent replacement of engine oil, but also affect the cleaning effect of automotive engine oil.

In addition, if a car does not travel to 5000 kilometers a year, we should also replace the engine oil to prevent damage to the car engine caused by no use for a long time. The type of oil and the corresponding replacement cycle: 1, mineral oil: 5000 km or 3 months to replace once; 2, semi-synthetic oil: 7500 km or 6 months to replace once; 3, synthetic oil: 10000 km or 1 year replacement.