What do we need to do when the new car is guaranteed first? Let's talk about the car's first insurance, and then look at the Han Teng X5 model.

When the new car we bought has traveled nearly 3 thousand kilometers, or within three months, we have to go to the 4s shop for the first insurance. This first insurance is generally free, but when doing the first insurance, the service consultant will generally recommend some service items to you, such as upgrading the original engine oil to a higher grade engine oil, cleaning the engine, adding fuel additives and so on. In short, it is to make you spend more money. So what items do we have when we do the first insurance? When is the best time to do the first insurance? Do you need to upgrade these projects?

Many people think that the first insurance of a car is to change the oil and filter it. When the car leaves the factory, the engine is filled with initial oil and should be replaced at the end of the running-in period. What else is there? Blow the air filter and air conditioner filter once at most. In fact, the first insurance of a car is not only to change the oil, the filter is so simple, but also includes a series of inspections, such as whether the screws of the chassis are loose, whether all kinds of oil are sufficient, whether the tires are eccentric and so on. These projects are also done for free.

Everyone thinks that the car comes from a standard production line and the assembly process is the same, so there should be no problem. In fact, many cars on the production line are also neglected and left behind. For example, some time ago, a brand new car forgot to install brake pads on the rear wheels; There is also an extremely popular Japanese car model, the screws of the rear suspension are not tightened, and so on. Although these are small probability events, it does not mean that they do not exist. In addition, in the process of automobile assembly, the fastening of parts will produce certain internal stress, which will lead to slight deformation of parts. After the car is used for a period of time, the internal stress will dissipate, but the tightening torque of the bolt may be insufficient. Therefore, it is very important to check and re-tighten the first insurance. My personal suggestion is: in the first insurance, after the car is lifted by the elevator, tighten all the screws and tire screws in all parts of the chassis suspension system according to the standard torque.

In addition, in the process of automobile assembly, the fastening of parts will produce certain internal stress, which will lead to slight deformation of parts. After the car is used for a period of time, the internal stress will dissipate, but the tightening torque of the bolt may be insufficient. Therefore, it is very important to check and re-tighten the first insurance. My personal suggestion is: in the first insurance, after the car is lifted by the elevator, tighten all the screws and tire screws in all parts of the chassis suspension system according to the standard torque.

Another important point is the adjustment of tire pressure. After the car is off the assembly line, it will not be delivered directly to the user, but will be parked for a long time, and some unsalable models will even be parked for several months until more than one year. In this way, when a certain part of the tire touches the ground for a long time, local deformation will occur, resulting in the destruction of the tire dynamic balance. In order to prevent this from happening, the tire pressure of cars is relatively high when they leave the factory, generally above 3.0bar, while the tire pressure of our normal driving is generally between 2.2 and 2.5 bar. Therefore, the tire pressure must be adjusted after the car is sold to customers. However, in order to make the tires of cars parked for a long time wear more evenly, 4s stores generally adjust the tire pressure when the car is first insured.

So, is it necessary for us to upgrade the maintenance project during the first insurance period? For example, if the engine oil is free, use the so-called "original engine oil"; If you pay more, I will give you a better brand of oil. In this regard, I personally suggest replacing better brand oil. Because the so-called "original engine oil" is generally mineral engine oil that can just meet the needs of automobiles, the protection of the engine is limited. If you want to protect the engine better, you should use a higher grade oil. However, the upgrade level should not be too high, just a higher level. For example, the original engine oil is SL grade mineral engine oil, and we can upgrade it to SM grade semi-synthetic engine oil; If the original engine oil is SM-grade semi-synthetic engine oil, we can upgrade it to SN- grade all-synthetic engine oil, and so on. However, the viscosity grade of engine oil cannot be changed and must be consistent with the original engine oil. For example, the original engine oil was 5W-30, and after upgrading, the engine oil with viscosity grade of 5W-30 will still be used.

So is it necessary to clean the engine? I think I'd better forget it. The so-called engine cleaning is to add a special cleaning oil to the engine to clean the sludge, paint film and carbon deposits accumulated in the engine for a long time. But a new car that has only traveled thousands of kilometers, what dirty things will be in the engine? In addition, the oil itself has a cleaning function. As long as we use genuine engine oil and maintain the car in time, the engine is generally relatively clean. If the engine is too dirty, there must be something wrong with the oil used, or the engine is too worn.

In addition, service consultants will generally recommend fuel additives to you during the first insurance, saying that it can remove carbon deposits, increase power, reduce emissions and so on. In short, it is almost a panacea that can cure any disease. At this point, it depends on the specific model. Japanese engines in a certain field require that their special fuel additives must be added every 5 thousand kilometers, otherwise they will not be guaranteed; There are also some turbocharged direct injection vehicles, and fuel additives are generally recommended. And naturally aspirated engine models, I don't think it is necessary. ? Finally, when is the best time for the first insurance? Generally speaking, the automobile instruction manual stipulates that the new car will be guaranteed for five months or five thousand kilometers, and the 4s shop generally stipulates three months or three thousand kilometers. I quite agree with the regulations of 4s shop, because it usually takes several months for a new car to leave the factory and get it from the owner. If the delay time is too long, the initial oil in the engine will deteriorate; And most cars are driving on the congested roads in the city. This low-speed and low-load situation belongs to "damaging driving" and the oil consumption is very serious. In this case, the mileage of oil change should be shortened. Therefore, my personal suggestion is that the first insurance time of the car should not be too long, and it should be completed within three months or three thousand kilometers, and the shorter the process, the better. It is best to run three thousand kilometers in the shortest time before doing the first insurance.