What is the reason why the car has to change the engine oil once when it reaches 5000 kilometers?

Because after 5,000 kilometers of driving, the lubrication effect of the oil will be greatly reduced, so you have to change the oil once.

Because the driving time is too long, the viscosity of the oil will become smaller, and the resistance of the lubricating oil will become larger, which is not conducive to the long-term driving of the car, so it must be replaced.

Because the quality of some oils is relatively poor, after 5000 kilometers, the lubrication effect is almost gone.

Because the performance of such an engine is no longer good, we must maintain the engine and change the oil, so that the performance of the car will be restored.

Because this is good for the car, and it can also increase the service life of the car, and it will also reduce the possibility of danger.

In order to make the car run better, and in order not to damage the service life of the car, this will be done.

Want. Because after 5,000 kilometers of the car, the oil performance of the engine will decrease, so it needs to be replaced.

Yes, the engine oil must be changed once after 5000 kilometers, because at this time it becomes very turbid, and it is necessary to replace it with a new one, so that the kinetic energy will increase.

Yes, it really needs to be replaced, because it will keep the engine from being damaged, which is better for the engine.

It is more reasonable to change the engine oil once in 5000 kilometers.

There are two types of motor oils: fully synthetic, semi-synthetic, and mineral.

The oil change interval of fully synthetic engine oil is basically about 12,000 to 15,000 kilometers, and if it is combined with a long-term machine filter, it can be completely changed once more than 20,000 kilometers.

Semi-synthetic engine oil, its lubrication effect is slightly better than mineral engine oil, basically can reach about 8000 kilometers.

Mineral engine oil, in most car maintenance, as long as it is not a high-grade model, such as a 100,000-level daily transportation car, most of them use mineral engine oil.

It is easy to buy a car and difficult to maintain a car, in addition to refueling, the most "troublesome and expensive" thing for car owners is maintenance. Oil maintenance is one of the most important things. First of all, we need to understand what motor oil is used for.

Engine oil is the engine lubricating oil, which mainly plays the role of lubrication and wear reduction, auxiliary cooling and cooling, sealing and leakage, rust and corrosion prevention, shock absorption and buffering, etc., and is known as the "blood" of the car. If there is a problem with the oil, the engine will go wrong and the car will have a problem.

As for how the 5,000 km oil change came about, there is a saying that there is a fast repair chain in the United States called Jiffy Lube, and every time a car is maintained, a paper will be posted on the front windshield to remind you to do maintenance at this time or mileage, and Jiffy Lube's standard is 3,000 miles (4,800 km).

However, with the improvement of engine oil quality, this standard has long been outdated, and now domestic 4S stores require 5000 kilometers of maintenance, mostly for profit. Because the competition in the automobile market is becoming more and more fierce, it is no longer very profitable to sell cars, in order to maintain sufficient profits, we can only start from the after-sales service, and shortening the maintenance cycle is one of the means.