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Many of you know is basically the oil for a brand of trust, specific to the oil level, viscosity do not quite understand, the friends sharing of oil and some basic common sense and classification. First there is two indexes, one is the American engineer association (API) the level of the index, and the second is American petroleum institute (SAE) viscosity index also called low temperature fluidity indexes. The two identified in the oil barrel can be seen.1.Oil is used car as base oil mineral oil, with the oil and gasoline engine points with two kinds of diesel engine oil, gasoline engine oil to S beginning the letters on the back after the better, such as SF, SG, SH, SJ, SL, SM, etc. The diesel engine oil is based on C opening, the back of the letter is also the same with the better. Such as CC, CD, or CF, CG, CJ belong to single grade oil category2.In the single stage on the basis of oil and multilevel also called general motors or composite oil, for example, SF/CD, SG/CF and so on, it is the gasoline engine and diesel engine in oil.3. With the improving of the engine technology, the requirements of oil to more and more is also high, the emergence of a half a synthesis, all synthetic oil, especially turbocharged engines, as far as possible use half a synthesis or total synthesis of oil, in shear force and car DVD player reduce the high temperature carbonization aspect is the common three times as much as the oil in our life.4.Had said the oil level and motor oil viscosity, engine oil to the requirements of the viscosity also is to have cultured, such as a new car suggest using low viscosity oil. Traveled more engine use high viscosity some oil, said method is in W before the smaller letters numerical lower viscosity, such as 0 W30, 5 W40, 10 W40 and so on, the greater the letters before in W the higher viscosity. For example, the 10 W30, 15 W40, etc. Engine wear 60% is in the activated when the few seconds or more than ten seconds. This requires the oil in the low temperature have good liquidity, in the moment to start a pair of friction between. And the viscosity of oil in the start of a few seconds, it is difficult to reach. Especially the north in their teens and 20 degrees below zero of the cold weather.5.The oil had better not mixed with different brand, sometimes check engine oil partial for a little time with the same brand best oil, car DVD because different brands oil additives different, will be under high temperature to produce some chemical reaction, reduce the lubrication function, can produce some serious things and jam oil way glue, cause the engine more severe damage.6.Oil change is according to the auto companies requirements of the oil level, driving kilometers or time the oil changed. Because the auto companies is the most authoritative. Article Tags: Gasoline Engine, Diesel Engine
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