Why do German cars burn engine oil, why do German cars generally burn engine oil, day

First of all, let's take a look at the processing technology of the engine cylinder of the German car, the engine cylinder wall is shown as a mesh shape under the microscope (the cylinder wall is usually bright from the naked eye).

This is because the German car directly grinds with grinding sand strips after finishing the finishing of the inner wall of the cylinder, and forms a anilox processing knife mark at an angle of 30 ° with the horizontal line on the inner wall of the cylinder, and the depth of this knife mark is about millimeters.

Each small mesh is a "small oil depot" where the oil is stored, and the piston is better lubricated than the flat cylinder wall when running up and down in the cylinder, which minimizes wear between the piston ring and the cylinder wall.

Therefore, after driving hundreds of thousands of kilometers, the wear of the engine cylinder wall of the German car is much smaller than that of other car series, and the engine can still maintain good working condition (mainly referring to cylinder pressure).

So why burn engine oil?

This refers to the large oil consumption compared to other models, because the cylinder wall of German cars is mesh-shaped, and the residual oil in the mesh "small oil depot" is burned when the piston is doing work (ignition and ignition) downward.

This design of the engine cylinder, used in European countries, burns much less oil than in China, the reason is that the roads in European countries are better, running at high speeds, and the engine is under high speed conditions, and the mesh of the mesh wall (small oil depot) stores less oil and burns less.

The maximum speed on highways in our country is 120 kilometers per hour, how much time do most cars spend running at high speeds? In the urban area can have a speed of 40 kilometers per hour is very good, plus the road blockage, long-term low speed, waiting for the red light at each intersection, the engine is in the idle state for too much time, such an engine working environment, resulting in more oil staying in the cylinder mesh, and more oil burned.

This is the same reason why a car runs long distances to save fuel and drives in the city. From a technical point of view, such an oil burning is an effective protection for the engine cylinder wall.

What to do with the German car that is still burning engine oil, you can make appropriate supplements when the oil is consumed to a certain extent, or shorten the original 10,000 kilometers to 5,000 to 7,000 kilometers to change the engine oil.

To sum up, the truth of German car burning engine oil is because of the mechanical structure. In the early stage, more oil is consumed in order to ensure the life and strong power of the engine.

So how to distinguish between "burning engine oil" and "normal wear and tear"?

Cool car burning oil: every morning when the car is on for the first time, the rear exhaust pipe will have a relatively thick blue smoke discharge, and the blue smoke will disappear after a while;

Burn engine oil when accelerating: When the vehicle is driving and slamming on the accelerator or the car is on the spot, a large amount of blue smoke is discharged from the exhaust pipe; In severe cases, when the vehicle is driving and the accelerator is pressed, the blue smoke can be seen in the reflector on the exhaust pipe side.

<> "Why do German cars generally burn engine oil, but Japanese cars don't burn for 20 years?" The maintenance worker said so.

There are also many brands in the domestic automobile market, but the majority are still German cars and Japanese cars, these two series of cars because they entered the Chinese market earlier, and the reputation is also good, so they are still more popular with everyone, but in recent years, the problem of burning engine oil in German cars has been complained about by everyone, and on the other hand, Japanese cars basically do not burn engine oil for 20 years, is this true? Today we will go to **. Why do German cars generally burn engine oil, while Japanese cars don't burn for 20 years?

That's what the maintenance guy said!

First of all, we need to understand what exactly is burning engine oil. Burning engine oil is actually the oil entering the combustion chamber of the engine and participating in the combustion together with the mixture. In fact, the problem of burning engine oil is generally a problem with the sealing system, such as the aging of some sealing parts.

In fact, whether it is a German car or a Japanese car that is resistant to collapse, the phenomenon of burning engine oil will occur after a long time, so there will be no Japanese car that does not burn engine oil for 20 years, but German cars do burn engine oil faster than Japanese cars, what is the reason for this?

This is because the engine operating temperature of German cars is higher than that of Japanese cars, and we all know that the ideal operating temperature of the engine is generally between 85 degrees and 105 degrees. If this temperature is exceeded, it will damage such as oil seals, sealing rings, piston rings, etc., greatly reducing the service life of the engine. The engine working temperature of German cars is generally between 100-105 degrees, and the temperature even reaches 110 degrees after entering the turbine era, so it is easier to burn engine oil.

However, Japanese cars from the beginning of production pay more attention to durability, practical, engine temperature working temperature is generally around 90-95 degrees, than the German car engine temperature is much lower, so it is more durable, but not 20 years do not burn the engine oil. The above is why Changmo German car oil burning is more serious, and we can also refer to it appropriately when buying a car.

The main reason for burning engine oil.

There is a problem with the fittings, the wastegas valve, the valve seal, the cylinder is pulled in the cylinder, and the cylinder pressure is insufficient.

If the oil circuit is not cleaned for a long time, the antifreeze is not replaced in time, the oil life cycle is too long, the piston ring is stuck, and the more common situation is that the piston ring is stuck.

What is piston ring seizure.

Stagnation starts from the oil circuit, the oil bears the temperature at 110 degrees, and the high temperature caused by the long-term unclean oil circuit makes the oil at a temperature of 120 degrees or higher for a long time, so that the oil will fail in advance, the small hole of the oil ring is very small, and the oil inside will be dried and scabbed for a long time. Sanzen becomes a liter of engine oil for 1000 kilometers or even hundreds of kilometers.

Solution. At present, there are two methods on the market to solve the problem, one is overhaul, and the second is PNF repair agent. In the case of overhaul, the cost is very high, the vehicle depreciates quickly, and the later run-in is also very troublesome.

I've seen riders repair it with PNF repair agent before.

Because the gap between the piston ring and the cylinder wall of the German car is relatively large, and the piston ring is the thing that blocks the oil from entering the combustion chamber, so the German car loves to burn the engine oil.

Because German cars do not pay special attention to the configuration of the gearbox and the oil bridge Xianshan box Paifeng, and pay more attention to other aspects of performance, so Minzhong prefers to burn engine oil.

Because German cars are generally likely to have piston rings and cylinder walls, the gap in the middle may be larger, which will cost more oil.