机油级别（Oil level）

机油级别（Oil level） 机油级别(Oil level) Oil level Internationally recognized for the viscosity and level of lubricant products, the American Institute of Automotive Engineers' oil viscosity classification, namely SAE, and the American Petroleum Institute quality standards, namely API. The American Petroleum Institute is according to the oil quality grade of oil will be divided into different levels, the standard with the letter "S" on behalf of gasoline engine oil, and then the different grades of oil English were ranked in alphabetical order according to the letter "S", such as: SE, SF, SG, SH, SJ. In the letters "S" after the letter, according to the English alphabetical order, the more backward, indicating that the higher the oil level, such as: SH level better than SG, SJ class better than SH level. The American Society of Automotive Engineers classified oil quality according to the oil viscosity classification method. The first type is single stage viscosity type, which is divided into high temperature environment type and low temperature environment type. High temperature environment with engine oil mark is: SAE30, SAE40, SAE50, SAE, marked figures indicate that at 100 degrees Celsius viscosity of the oil, the greater the number, indicating that the greater the viscosity of the engine oil. Because the viscosity of this kind of oil is relatively large, it is suitable for use in summer. The higher the temperature, the larger the number of products should be chosen. Low temperature environmental type oil labels are: SAE0W, SAE15W, SAE20W, SAE after W, indicating winter, and the figures also indicate viscosity, the smaller the number, the smaller the viscosity. As this type of engine oil is used for low temperature in winter and low in viscosity, the lower the temperature should be the smaller the number of engine oil. The oil viscosity is low, the speed of the engine start more; at the same time the oil pour point is lower, the easier it will be to the oil pump, can be more efficient to shorten engine lubrication, withstand dry friction time. The second type is multi-stage viscosity, all-weather type: Oil labels are: SAE5W - 30, SAE15W - 40, SAE20W - 50. The first half of the marking bar represents the low temperature viscosity of the label oil in winter, and the second half of the cross bar indicates the high temperature viscosity in summer. The smaller the figure before W, the better the fluidity of the lubricant at low temperatures, and the easier it is to start the car. The larger the number behind the W, it shows that the oil in the high temperature environment, the better the viscosity, the oil film strength is stronger, the oil can basically be used all the year round How to distinguish between oil categories, viscosity standards and quality levels? At present, the engine oil on the market is divided into mineral oil and synthetic oil. The difference is that the base oils are different. The base oil of mineral oil is extracted from crude oil, and the base oil of synthetic oil is synthesized by chemistry. Compared with mineral oil, the synthetic oil has high temperature resistance, oxidation resistance, resistance to change of viscosity and stronger wear resistance. The viscosity change of synthetic oil is very little affected by temperature, so it can flow smoothly in low temperature environment, maintain proper viscosity in high temperature environment, and reduce engine wear. In addition, synthetic oil refining of high purity, high temperature in engine continuous operation, not easy to produce oxidative decomposition of sludge and carbon, the degradation rates of 50% slower than mineral oil, use time is longer, the general use of mineral oil driving 5000 kilometers to the oil and synthetic oil, oil, its mileage can be extended to 8000-10000 km. Therefore, even though synthetic oil is more expensive than mineral oil, it is still favored by more and more people. Viscosity standards and quality levels The viscosity and level of oil is a decisive factor in the proper use of oil. Internationally recognized oil viscosity and quality level, the use of SAE oil viscosity classification and API quality standards. viscosity The oil is divided into single viscosity oil (such as SAE30) and oil (such as SAE5W-30), now most of the vehicles use more oil, because the oil contains a variety of special additives, easy to make the oil flow, in low temperature environment without condensation, keep viscosity, does not decompose in high temperature environment. The W in the oil label indicates winter (Winter). The figure before W indicates the low temperature fluidity of the engine oil. The smaller the number is, the better the oil flow is. Engine wear is mainly concentrated in cold start moment, good oil flow, To minimize engine wear. The number after W indicates the high temperature viscosity of the engine oil. The bigger the number, the better the protection performance under high temperature. In addition, we must consider the choice of oil viscosity new car, new car engine parts clearance is very small, so we should choose low viscosity oil, and engine wear serious vehicle should choose the larger oil viscosity. level The API standard with the letter "S" and "C" represent the gasoline engine oil and diesel engine oil, and then press the English alphabetical order respectively after the letter "S" and "C" from "SA" to "SL", English in alphabetical order by said the higher performance of the oil level, oil more good. For example, Total QUARTZ series oil bottle logo: APISL/CF, "S" and "C" at the same time, the oil is suitable for gasoline and two diesel engine, and give priority to the gasoline engine, and the engine oil level to the highest level "SL". Basic knowledge of oil have a certain understanding, according to the requirements of the lowest level of automobile manufacturers and oil viscosity standard, combined with the current situation of oil control car, packaging and labeling, can be selected to suit the car oil added. Experts recommend that owners use those international brands of oil, such as Shell, Total, Mobil, the world famous oil company production of refined oil, through the international standard certification, performance and quality of the product is more reliable. American Petroleum Association (API) performance rating: oil points gasoline, engine oil and diesel engine oil; gasoline engine oil is expressed in S; diesel engine oil is expressed in C; level ABCDE; the higher the better; at present the highest SJ, CH. Generally, the outer packing is marked, and some gasoline engines and diesel engines are common. There is also a viscosity grade, which involves climatic factors, not extreme weather, and is generally not to be considered. Oil level viscosity coefficient See viscosity The viscosity and level of oil is a decisive factor in the proper use of oil. Internationally recognized oil viscosity and quality level, the use of SAE oil viscosity classification and API quality standards. The oil is divided into single viscosity oil (such as SAE30) and oil (such as SAE5W-30), now most of the vehicles use more oil, because the oil contains a variety of special additives, easy to make the oil flow, in low temperature environment without condensation, keep viscosity, does not decompose in high temperature environment. Alphabetic code parsing The W in the oil label indicates winter (Winter). The figure before W indicates the low temperature fluidity of the engine oil. The smaller the number is, the better the oil flow is. Engine wear mainly concentrated in cold start moment, good oil flow, can minimize engine wear. The number after W indicates the high temperature viscosity of the engine oil. The bigger the number, the better the protection performance under high temperature. In addition, we must consider the choice of oil viscosity new car, new car engine parts clearance is very small, so we should choose low viscosity oil, and engine wear serious vehicle should choose the larger oil viscosity. American Petroleum Engineer Society (SAE) classification of engine oils. SAE is used in viscosity grade classification method, high temperature, lubricating oil into the summer for the winter and winter low temperature type universal all-weather type. The specific meaning is as follows: Used in the winter 6, summer oil is 4, and there are 16 kinds of common oil. 1., winter oil grades are: 0W, 5W, 10W, 15W, 20W, 25W, W, symbol W represents winter, the smaller the number before the lower viscosity of low temperature, low temperature, the better, the minimum applicable temperature lower; 2. summer oil grades are: 20, 30, 40, 50, the greater the number, the greater the viscosity, the higher the maximum temperature applicable; 3. generic summer oil grade were: 5W / 20, 5W/30, 5W / 40, 5W / 50, 10W / 20, 10W / 30, 10W / 40, 10W / 50, 15W / 20, 15W / 30, 15W / 40, 15W / 50, 20W / 20, 20W / 30, 20W / 40, 20W/50, on behalf of the winter part of the smaller numbers, representing a portion of the Summer Digital higher viscosity and high temperature range is applicable. High temperature type (such as SAE20 ~ SAE50) - the number indicated indicates viscosity at 100 degrees centigrade. The greater the figure, the higher the viscosity. Low temperature type (such as SAEOW ~ SAE25W):W is the abbreviation of Winter (winter), which means only for winter, the smaller the number, the lower the viscosity, the better the low temperature flow. All-weather? Type (such as SAE15W / 40, 10W/40, 5W/50) said: when the temperature is low viscosity grade respectively with SAE15W, 10W, 5W, high temperature viscosity grade respectively with SAE40, 50, and belongs to the general.