The engine is most afraid of winter, so don't blame the increase of oil if it is not warmed up properly.

Recently, the weather is getting warmer and the epidemic situation is under control. Many people have plans to travel by car. However, when some car owners check the condition of their cars before driving, they find that their cars are "filled with oil" and "covered with emulsified oil". However, some people report that they often run several high-speed laps when they find this situation, and then the problem will be solved by themselves. In this regard, some experts who understand this situation responded that "oil increase" and "oil cover emulsification" are indeed reversible.

Can running a few laps at high speed really solve the problem of increasing engine oil?

The increase of oil can be controlled because there are several preconditions for the increase of vehicle oil. Among them, the cold weather is a large part of the incentive for oil increase, just as driving in the north is more likely to cause oil increase than driving in the south.

Why is the increase in oil quantity affected by the cold weather? This is because at low temperature, the engine's heat engine efficiency will be reduced, and the steam and part of gasoline produced in the combustion chamber will not volatilize after flowing into the crankcase, thus mixing with the engine oil, resulting in the phenomenon that the engine oil level will rise.

At the same time, because many car owners are used to driving at short distances and low speeds, this further leads to the situation that vehicles are prone to increase oil. It is precisely because of the low temperature that the engine is idling, and short-distance or low-speed driving cannot ensure the evaporation of water vapor and gasoline in the crankcase. If the owner arrives at the destination soon after starting the vehicle, it will increase the probability of increasing the fuel quantity.

In this regard, Professor Yao Chunde from the School of Mechanical Engineering of Tianjin University suggested that the majority of car owners should run a few laps at high speed when driving in winter to prepare for warm-up to avoid the increase of oil. This also confirms that some car owners have reported that the problem will be solved after running at high speed.

"Oil cap emulsification" is a normal phenomenon. Is it really a big problem?

When it comes to the emulsification of oil cover, it is actually easier to solve than the increase of oil. Emulsifying phenomenon discovered by some car owners is actually a milky viscous substance covered on the oil cover, which is also related to the water vapor flowing into the crankcase.

Part of the water vapor condenses into water droplets on the oil cover, and when the oil fluctuates up and down during driving, the incompatibility between the two is prone to emulsifying phenomenon. However, this is only a normal physical reaction. Professor Shuai Jin Shi, deputy director of the Combustion Energy Center of Tsinghua University, also explained this: "If the oil cover is only slightly emulsified, the problem is not very big."

In fact, the phenomenon of "oil cover emulsification" is just like the cup we have used for a long time. The lid of the cup is prone to tea stains, but it will be fine as long as it is cleaned regularly. However, if the owner uses the dipstick to detect the whitening of the oil during the vehicle inspection, there may be the influence of full emulsification of the oil.

The complete emulsification of engine oil is a very serious matter, which will not only lead to the deterioration of engine oil, but also greatly reduce its lubrication performance. This situation is basically caused by cracks in the engine and the infiltration of a large amount of cooling water. If this happens, it will be impossible to overhaul the engine.

With the coming of spring, many people choose go on road trip. Here, we must also remind the majority of car owners that they must do a good job of vehicle inspection before going out to ensure the safety of travel. However, if some car owners find that the oil is increased or the oil cover is emulsified, don't worry too much. As long as you drive normally and take good care, you can effectively avoid these situations and will not have much impact on the later car use.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.