We can divide the car maintenance into two types. The first is basic maintenance, i.e. replace the oil and filter, and conduct the whole car inspection. The second is to deepen the maintenance, and replace the damaged parts according to the defects found in the whole car inspection.
1. Basic maintenance basic maintenance is the most basic maintenance. The cycle is determined by the oil used. Mineral oil is maintained once every 5000 km / 6 months, semi synthetic oil is maintained once every 7.5000 km / 6 months, and full synthetic oil is maintained once every 10000 km / 12 months.
The photo store usually calls the owner 1-2 months in advance to remind or call the owner for maintenance. Don't pay attention to them. The maintenance cycle of the engine oil is the same as that of the engine oil. The 4S store calls in advance to shorten the maintenance mileage and improve the rate of entering the store.
In addition to changing the engine oil and filter for basic maintenance, the whole vehicle inspection is also very important. The whole vehicle inspection is equivalent to a physical examination. Only through the inspection can the maintenance technician know where there is a problem that needs to be repaired. The part to be repaired belongs to the deepening maintenance, which is also the place with the deepest water in the maintenance.
2. The place where the maintenance shop makes money is to deepen the maintenance, which is why we have the illusion that "the car drives well, why there are so many problems when it is checked".
In fact, some "problems" are not our car's problems, but the "problems" created by the 4S store in order to improve the output value and let us over maintain. The service consultant will have various reasons, such as the car's power is not good, there is too much carbon deposition, there is a strange noise somewhere, etc.
Carbon cleaning is actually very chicken ribs. Just like people eat health care products, it can be said to be useful or useless. Anyway, it won't damage the car. The profit of washing once is high. Why don't you let the owner wash it?
How to determine whether to clean the carbon deposit?
If you want us to clean the carbon deposit on the throttle, you can ask the technician to disassemble the connection between the intake manifold and the throttle body to see if there is carbon deposit on the throttle. If you want us to clean the carbon deposit in the cylinder, you can ask the technician to use the endoscope to see if there is carbon deposit in the cylinder.
If you want to clean the carbon deposit of the fuel injection nozzle, you can feel whether the power is weaker than before. If it is weaker, the fuel injection nozzle may be blocked by colloid.
In addition to cleaning items, the 4S store may also ask us to perform advanced maintenance.
For example, the brake service was only done during the last service, but this time it was required to be done. For example, the spark plug maintenance manual stipulates that it should be replaced every 40000 km, but the service consultant asked to replace it every 30000 km on the pretext that the spark plug gap is too large.
Advanced maintenance is unreasonable. When we do in-depth maintenance, we can look at the mileage corresponding to the maintenance manual and the maintenance items to be done. Based on the maintenance manual, we can select the parts to be serviced according to our actual experience of using the car and the results of the whole car inspection.
The problems found in the inspection of the whole car had better be confirmed by the maintenance technician. The technician can tell us why there is a problem with this part and how to solve it. Don't be embarrassed. Don't do it directly when the service consultant reports any items. This will make the maintenance unclear.
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