Cleaning: When the engine is working, when the piston moves up and down, some dirty things in the cylinder will drive the oil to clean the cylinder, but there will be an oil filter below to filter and recover the oil, but the oil will turn black after a period of use. Because the dirt has filled the machine filter.

Lubrication: When the engine is working, the oil circulates in the engine. Lubrication of piston and crankshaft connecting rod can effectively prevent wear and aging of engine parts and improve engine life.

Cooling: When the oil circulates in the engine, it can bring out some excess heat of the engine and play a cooling role. 、

Buffering: When the engine parts are running, it can play a buffering role with the help of the resistance of engine oil.

Second, the negative impact of not changing oil:

From the outside to the inside, if you don't change the oil for a long time, the oil will be dirty at first, which will increase the viscosity of the oil. When the engine parts are running, it will increase the resistance of customer service and naturally increase fuel consumption. Secondly, in the engine studio, there will be some natural loss of oil, but if it is not replaced for a long time, natural loss will increase the viscosity of oil.

Can not play a lubricating role: increase engine wear, serious engine scrap.

Unable to clean up: oil consumption is increasing day by day.

Can not play a cooling and buffering role: increase the workload of other cooling systems of the engine and affect the service life of other parts.

So for your car, you need to change the oil in time.

Third, the oil change cycle:

About 5000km~ 10000km, the road conditions and environmental quality are not good, so it needs to be replaced in advance.

It takes about 3 months to 6 months, usually at least half a year or 1000 km to change the oil.