机油类型（Oiltype）

机油类型（Oil type）
Imported brands of engine oils have been widely used in China. This paper introduces the method of marking oil correctly.
For example: "API SF SAE 15W/40""
API-- American Petroleum institute;
The SF-- engine oil quality code is suitable for the gasoline engine developed after 1980;
SAE-- American Society of automotive engineers;
15W/40-- oil viscosity is applicable to the range of -15 and -40 degrees centigrade.
SAE viscosity value and API mass value are used to identify the quality and viscosity value of imported engine oil. SAE (American Academy of Automotive Engineers) viscosity code and API (American Petroleum Society) quality label are widely used in the world. Table 1 mass index of engine oils for API-S series gasoline engines.
Table 1 engine oil quality rating of API-S series gasoline engine
Grade
Introduction of oil product range of the American Petroleum Institute (API)
American Society for testing and materials (ASTM) | oil performance
SA
For the use of gasoline engines and diesel engines.
An old-fashioned engine with very mild running conditions. It is no longer used except for the special recommendation of the automobile manufacturer
In addition to pour point depressant and anti foaming agent, other additives are not included in the oil.
SB
Use of gasoline engines with low load.
An old-fashioned gasoline engine for mild running conditions. It is no longer used except for the special recommendation of the automobile manufacturer.
The oil has a certain degree of antioxidant and anti-wear properties.
SC
Gasoline engines for 1964-1967 year cars and trucks. This kind of oil can control high and low temperature deposits, wear, corrosion and corrosion of gasoline.
The oil has the ability to prevent sediment and rust.
SD
A gasoline engine for 1968-1971 years of production of cars and parts of trucks, suitable for domestic gasoline engines such as liberation and dongfeng. This kind of oil can prevent gasoline engine from high temperature and low temperature sediment, wear, corrosion and corrosion better than SC grade oil, and can be used to replace SC grade oil.
The oil meets the requirements of the 1968-1971 years of the car factory, and has the properties of anti low temperature sludge and corrosion resistance.
SE
Gasoline engines for 1972 and some 1971 cars and some trucks. It is suitable for Peugeot, Santana, Xiali and early TOYOTA, Nissan, Honda and other cars. The oxidation resistance of this kind of oil and its protective performance against high temperature sediment, wear, corrosion and corrosion of gasoline engine are better than that of SC or SD grade oil, and can be used instead of SC or SD grade oil.
The oil meets the requirements of the automobile factory for 1972-1979 years. It is mainly used in cars. It has high temperature oxidation resistance and low temperature sludge and rust resistance.
SF
For the gasoline engine after the car manufacturer's recommended maintenance methods of operation in 1980 | cars and trucks, such as Audi, Cherokee models. The oxidation resistance and wear resistance of this kind of oil is better than that of SE grade oil, and it can be used instead of SE, SD or SC grade oil.
The oil meets the requirements of the automobile factory in 1980. It is mainly used in various harsh operating conditions. It has the properties of oil sludge resistance, paint film resistance, rust resistance, wear resistance and high temperature resistance thickening.
SG
It has higher detergency, high temperature oxidation stability and wear resistance than SF.
Applies to all domestic and imported new six cylinder above BMW, Jaguar, Cadillac, Lexus, Lake Lincoln and other senior car, and can meet all kinds of medium-sized passenger cars use gasoline engine.
It has better high temperature resistance to oxygen, detergency and abrasion resistance than SF grade.
SH
It has better performance than SG, and it has good detergency at high temperature. For Lincoln, Cady lake, Mercedes Benz and
BMW and Honda's new imported cars.
It has better high temperature resistance to oxygen, detergency and abrasion resistance than SG grade.
(1) classification standard of SAE engine oil viscosity.
SAE oil viscosity classification standard, the oil is divided into high temperature viscosity grade and low temperature viscosity class number, class number at the end of W with low viscosity level number, digital value viscosity value.
Single stage oil:
One of the viscosity values measured at -18 and 100 OC is called single-stage oil.
According to -18 temperature (winter) engine oil is divided into OW, 5W, 1OW, 15W, 2OW, 25W and other six levels; according to 100 degrees of temperature (spring, summer, autumn use) engine oil is divided into 20, 30, 40 and 50 four grades.
Multistage oil:
An engine oil that can meet the requirements of -18 and 100 degrees of viscosity at the same time is called "multi grade oil" (i.e., thickening oil). Two.
Multi grade oil marks are 5W/20, 1OW/30, 15W/40, 30W/40 and so on. This oil can be adapted to the temperature change of the region, therefore, the scope of generic summer in an area.
For example, the engine oil marked SAE 15W/40 can be used in the temperature range of -15 degrees -40 degrees celsius.
(2) quality grading standard of API. API usage labeling is jointly developed by the American Petroleum Institute (API), the American Academy of Automotive Engineers (SAE) and the United States Institute of materials and testing (ASTM). The engine oil is divided into two parts according to the performance and application occasion of the engine oil:
S series (gasoline engine series): SA, SB, SC, SD, SE, SF, SG, SH, SI, SJ and other grades.
C series (diesel engine series): CA, CB, CC, CD, CE and other grades.
Table 2 mass index of engine oils for API series diesel engines.
From table 1 and 2, it can be seen that the better the performance is, the more stringent the working conditions of the model are.
Table 2 engine oil quality mark of API C series
Grade
Introduction of oil product range of the American Petroleum Institute (API)
Introduction to the performance of American Institute of
materials testing (ASTM)
CA
For light duty diesel engine use.
A diesel engine that runs on mild fuel to moderate fuel, and is also used in mild gasoline engines. But it is no longer used except for the special recommendation of the automobile manufacturer.
Non supercharged diesel engines for gasoline engines and low sulfur fuels.
CB
Usage of medium load diesel engine.
A diesel engine operating at light to moderate loads. It has higher protection against engine wear and sediment. It can sometimes be used to run mild gasoline engines. For non supercharged diesel engines using high sulfur fuels, corrosion resistance and high temperature deposits can be prevented.
Used in gasoline engines and non supercharged diesel engines.
CC
Application of medium load diesel engine and gasoline engine.
A low supercharged diesel engine used for medium to heavy loads
and includes some heavy duty gasoline engines. For low supercharged diesel engines, this kind of oil can prevent high temperature deposits; for gasoline engines, it can prevent corrosion, corrosion and low temperature deposits.
With low temperature to prevent sludge and rust performance, and has the ability to adapt to the needs of low supercharged diesel engine
CD
The use of heavy duty diesel engines.
A high speed, high power turbocharged diesel engine that requires very effective control of wear and sediment. It can effectively prevent the corrosion of bearings and the high temperature deposits from the use of excellent and inferior fuel for turbocharged diesel engines.
Performance requirements of an adaptive turbocharged diesel engine.
CE
Application of supercharged intercooler diesel engine for heavy load.
A new type of high speed and high power turbocharged intercooler diesel engine for very effective control of wear and sediment.
Performance requirements for turbocharged diesel engines with
heavy load.
S series - gasoline engine oil series in different levels, in turn reflects the different performance of the engine and the development of the structure of the different requirements.
C series diesel engine oil series from CA, CB and development to CC, C
D and C
E level, reflects the process of improving performance of automotive diesel engine after strengthening.。