The probability of a cooling system failure in a vehicle will be increased gradually, and it is necessary to know the working principle of the system and what problems should be noted during the use of the system, if it is not intended to be broken down by the cooling system failure.
1. The oil overfilling of the engine oil is also standard, not the more the more the more, if the oil filling amount is too much, the rotation of the crankshaft will be more resistant, thus affecting the power output and increasing the oil consumption. The amount of oil entering the combustion chamber is greatly increased, the internal product of the combustion chamber is increased, the motion resistance of the piston is increased, and the power of the engine is reduced. At the same time, the air-fuel ratio of the combustion chamber is changed, the probability of knocking is increased, and the noise also increases.
2. The more the medium-carbon-old engine oil is, the more and more carbon is accumulated. The oil is lean and the oil is easy to flow, which causes more and more carbon. When a new engine oil is used, the engine can not adapt to the oil viscosity, and the high rotation speed is likely to be pulled, so that the engine noise is large. It is suggested to open a box of high-grade oil with high-grade gasoline at high rotation speed, and it is preferable to keep a case of high-grade oil which is open for more than 2500 revolutions to improve, and it is of course possible to perform preventive cleaning.
3. The oil viscosity is suitable for different grades of oil with different characteristics, and the low-temperature start-up property and high-temperature wear resistance and adhesion also have different performance. The viscosity of the engine oil is inversely proportional to the temperature. When the engine is cold, the oil viscosity is high, and if the selected oil is thick, additional losses will be added to the starting motor, the battery, and the like. However, if the oil is too thin, it is difficult to form enough protective film at high temperature to cause insufficient lubrication, resulting in increased wear of the machine parts. If the vehicle manual recommends that 5W-30, and the noise of the engine mainly used for 5W-40 is large, the owner will need to pay attention. It is recommended that the selected engine oil be the reference number recommended by the vehicle manual.
4. It is also common to mix the oil and oil. Because of the different technical formula of different brands, it is possible to produce a bad chemical reaction, change its own characteristics, so as to cause wear and noise to the engine. It is recommended that the vehicle friends do not mix the engine oil and use the same brand of oil as much as possible. In case of special case replacement of different brand oil, it is preferable to use the same reference number oil.
5. It is also possible to meet the condition of false oil, and because the novice driver is in service to his car, the poor oil is added. Because of the bad wear, cleaning and lubrication protection of the "false" oil, the engine pressure is too large, thus the abrasion is increased and the noise is increased. As a consumer, to know some of the related anti-counterfeiting knowledge, it is not only to say, to know how to distinguish the true and false of the oil.
