Before this, we must understand the role of oil.Oil is equivalent to the "blood" in the car engine，The most important use is that flowing between the components of the engine，It plays a lubricating effect，Strict wear between components and components。

Except for this most functional function，It also has some "additional functions"。For example, cooling and cooling、Clean and clean、Sealing leakage、Rust -proof and correction、Shock -absorbing buffer and other uses，It can be seen。Replacement oil is one of the most conventional maintenance items in car maintenance，High -quality motor oil, in addition to protecting the engine、Reduce the number of oil replacements，can also save gasoline overhead。but，Many people know very little about the use of motor oil，Even there are certain misunderstandings，If you don't pay attention, you may destroy the car in minutes!

Dark motor oil does not mean that it has deteriorated，The quality of brand genuine oil sold on the market is quite high，Can maintain the lubrication function at high temperature conditions。

Generally speaking，After adding a new oil，Disposus such as mud and accumulated carbon on the machines are scattered in oil，After a certain period of time, the color of the oil will become black。Experienced masters will determine whether to change the viscosity of the oil，instead of observing the color of the oil becomes black，It is determined that you need to replace。

During the daily maintenance process，The maintenance cycle of general vehicles is 3 months or 5000 kilometers，Some German cars are 6 seabet appmonths or 10000 kilometers。Many car owners will perform which standard will be performed in accordance with which standard，Actually not。

When replacing the oil, you can execute the manufacturer's maintenance policy. It is best to change it every 5 months，Even if only one or two thousand kilometers traveled in half a year，You need to replace，Due to the time when the oil is placed, it will deteriorate，Can't play a lubricating effect，It will only lead to an increased wear。If you drive every day，5000 kilometers to change to the engine better。Another，It is worth noting is，Machine oil does not add more and add more，The amount of oil should be controlled on the oil ruler、Between the delineation lines is better，It's not too much，It's not less。

Pay attention to check when using oil，Generally take 3 months，After 3 months, it is necessary to check the color of the oil after 5,000 kilometers.、viscosity, etc.，View whether it has deteriorated。Also，Drive in the city，There are traffic lights wherever you go，Pull the car if you can't move，And most of each trip does not exceed more than ten kilometers，This driving method belongs to "consuming driving"。Under the situation of "consuming driving"，It is recommended to shorten the interval time of replacement oil，can effectively protect the engine。

Current，Various oil additives on the market，All claims to effectively reduce the wear of the parts，Reduce fuel consumption，Many car owners are eager to try。

Machine oil additives cannot be added，There may be insoluble or chemical reactions between oil and additives。 If the owner adds an unsuitable additive to the oil，will cause changes in the lubrication properties of the engine，Not only will it not reduce the wear of the parts，Instead, it will cause more serious damage to the vehicle。

The amount of oil should be controlled on the oil ruler、Between the Dialogue Line。Because there is too much oil, seabet loginit will enter the combustion chamber from the gap between the cylinder and the piston to form a charcoal。These carbon deposits will increase the engine compression ratio，Increases the chance of generating explosion。

Second，Excessive oil increases the stirring resistance of the crankshaft connecting rod，Increasing fuel consumption。

Again，Adding more oil will increase the pressure inside the engine，It is easy to lead to mobilizing confidential sealing oil。

Some car owners believe that the lubricant with high viscosity can protect the engine，and some car owners think that the use of oil with low viscosity can save fuel，These ideas are all misunderstandings。To prevent the friction of parts inside the engine，Machine oil must have enough viscosity，Otherwise, it is impossible to form sufficient oil film protection at the operating temperature。However, the use of oil with too much viscosity，It will cause slow flow inside the oil、Increase resistance，Increased fuel fuel consumption，also reduced the power output of the engine。

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Use oil with low viscosity，Although it guarantees liquidity，But it is difficult to form a good oil film protection at the operating temperature，will cause damage to the engine，At the same time, it will also cause loss of power。Therefore, only the oil viscosity is used correctly，can the car in the best state。What kind of oil is the best oil for your car's engine，The use of the vehicle's manual is the clearest。

Don’t change motor oil for a long time，Machine Oil's ability to protect the engine will be reduced，It is not good to form a layer of lubricating protective film for the outer wall of the parts，Once the lubrication of oil is reduced，It will directly lead to an increase in component wear。

Only supplement does not change the oil, can only make up for the shortcomings of the oil，Can't fully compensate the loss of lubricating oil performance。