Car maintenance refers to the routine maintenance and inspection items specified by the manufacturer when the vehicle is driven for a certain period of time or mileage in order to ensure the performance and safety of the vehicle. Car owners master a certain degree of car maintenance common sense is the basic skills of the owner of the car, learn some maintenance knowledge is still good, there are some small problems in the car, they can easily get it done, when there are big problems, they will not be cheated by maintenance personnel.

How long is the maintenance period?
The maintenance cycle depends on the grade and grade of the oil used. Different grades of oil, their expiration date is also very different. For example, the validity of mineral oil is 5000 kilometers or three months; The validity period of semi-synthetic oil is 7500 km or half a year; The full synthetic oil is valid for 10,000 km or one year. You can also follow the manufacturer's recommendation.

First maintenance
First warranty as the name suggests, the first maintenance. In the new car purchase, many owners wonder who should listen to the first guarantee in the end? Each has his own story... Five thousand, three thousand, how to run in, how to save fuel, and many other problems!

First maintenance: Do not worry too much or care too much, 3000 kilometers, 5000 kilometers for the first protection is no big problem (or half a year) the first protection is to adapt to the adaptability of various components during the run-in of the new engine, the best speed during the run-in can be below 120km, It is best to run several times at high speed (depending on the situation of the car) for a long distance down to 3000 kilometers, 5000 kilometers can be replaced, during the run-in period is not conclusive oil or fuel saving, which is uncertain during the period.

Minor maintenance
Content of minor maintenance:
Small maintenance generally refers to the car after a certain distance, in order to ensure the performance of the vehicle in the time or mileage specified by the manufacturer to do routine maintenance projects. This mainly includes changing the oil and oil filter.

Small maintenance interval:
The time of minor maintenance depends on the effective time or mileage of the oil used and the oil filter. Different brand levels of mineral oil, semi-synthetic oil, fully synthetic oil validity period is not the same, can be recommended by the manufacturer. Oil filter is generally divided into conventional and long-acting two kinds, conventional oil filter random oil replacement, long-acting oil filter longer.

Supplies in minor maintenance:
1. Oil is the oil that runs the engine. It can lubricate, clean, cool, seal and reduce wear on the engine. It is of great significance to reduce the wear of engine parts and extend the service life.
2. Oil filter is a component that filters oil. Oil contains a certain amount of gum, impurities, moisture and additives; In the working process of the engine, the metal chips generated by the friction of various components, impurities in the inhaled air, oil oxides, etc., are the objects of oil filter filtration. If the oil is not filtered and directly enters the oil circuit cycle, it will adversely affect the performance and life of the engine.

Major maintenance
Major maintenance content:
Small maintenance items are covered by large maintenance; In other words, every time a major maintenance is performed, all the items included in the minor maintenance are generally performed. The major maintenance projects will also be differentiated in detail according to the different vehicle designs of different manufacturers. But in general, it will also have a simple commonality. The content of the major maintenance is the replacement of oil and oil filters, air filters, gasoline filters and other routine maintenance.

Big maintenance interval:
Large maintenance is based on the existence of small maintenance, and generally these two kinds of maintenance are carried out alternately. The interval varies according to the differences of car brands and models, and please refer to the manufacturer's recommendation.

Supplies in major maintenance:
In addition to replacing oil and oil filters, there are the following two items in car maintenance:

1. Air filter
The engine has to suck in a lot of air during operation, if the air is not filtered, the dust will accelerate the wear of the piston group and the cylinder. Larger particles enter between the piston and the cylinder, which will also cause serious "cylinder pulling" phenomenon. The role of the air filter is to filter out the dust and particles in the air to ensure that sufficient and clean air is entered into the cylinder.

2. Gasoline filter
The function of the gasoline filter is to provide clean fuel for the engine and filter out the moisture and impurities of the gasoline. This optimizes engine performance and provides the best protection for the engine.

Usually when carrying out car maintenance, the operator will do other checks according to the specific situation of the car, and will increase other maintenance items, after the vehicle travels a certain number of kilometers (after 30,000, or more) the whole car system needs large maintenance, the whole car oil such as: Brakes, steering, power, gearbox, all need to be replaced, of course, some are unnecessary (antifreeze, and timing belt these can be seen, do not be fooled) as for cleaning these items are of course done well! The key cost is too expensive (finally check the manual or ask a friend to have a bottom) the effect has, but it will not be obvious! Other safety components such as tires, brake pads, and these should be carefully checked.