How to choose engine oil? Take you to easily understand the specifications of engine oil.

Engine oil is an indispensable link in vehicle maintenance. Whether you are used to going to the garage, choosing the engine oil according to the suggestion of the garage owner, or buying the engine oil yourself and trying DIY replacement, have you noticed that the engine oil bottle is always covered with many words and signs? What do these slogans mean? How to choose the most suitable style for your pony when buying engine oil? Today, I will show you the mystery of engine oil!

Base oil structure

SAE viscosity code

American petroleum organization

ACEA certification

JASO certification

API？ certificate

API？ In order to prove the specifications formulated by api gravity, the first code in the label represents the applicable engine, S? The beginning stands for gasoline engine, C stands for diesel engine, and the second code is the quality grade of engine oil, ranking as follows: SA? 、SB？ 、SC？ 、SD？ 、SE？ 、SF？ 、SG？ 、SH？ 、SJ？ 、SL？ 、SM？ 、SN？ And SA? ~SE is an old certification mark and has been discontinued at present.

The commercial engine oil has at least SJ grade, and the bottom of the logo is marked with "ENERGY? Save? It means fuel economy, but it should be noted that not all models are suitable for using oil with fuel economy value, and it is still necessary to refer to the advice of the original factory for selection.

API？ Certification mark.

Suzuki? Gladys? 650, the original factory does not recommend the use of fuel-saving nature.

ACEA？ certificate

ACEA is a certification organization established by the European Automobile Manufacturers Association, which replaced the CCMC rating system. Similar to API, ACEA belongs to two major petroleum certification units and has considerable authority. In order to seize the market, oil manufacturers usually send oil products to these two major oil certification units for certification. ACEA？ The first code on the logo starts with a for gasoline engine, b for light diesel engine and e for heavy diesel engine; The second code is the quality of oil products. The higher the grade, the better the quality. They are A 1, A2, A3 and A5 respectively. At present, A2 oil certification has stopped.

ACEA certification mark.

ACEA doesn't use circular symbols like API.

JASO？ certificate

JASO certification is used to judge whether oil is suitable for dry clutch or wet clutch, that is, scooter or taxi. Usually, in order to achieve higher efficiency, a large number of anti-wear agents will be added to the engine oil used in dry clutch cars to reduce friction and increase lubrication. However, if this formula is used in wet clutch cars, it will lead to slippage, so it is marked as JASO? MB is suitable for dry-clutch vehicles: scooters or cars, otherwise it is marked JASO? Mashi is used for wet clutch vehicles: gear,? MA2 mark is suitable for motorcycles above 600c.c

JASO was founded by SAE (American Society of Automotive Engineers) in Japan.

JASO？ MA is suitable for vehicles with wet clutches.

JASO？ Suitable for motorcycles with MA2 above 600c.c

If you don't take the time to study the certification or labeling of engine oil, it is really puzzling, especially the painting of many engine oil brands is different, which is even more dazzling. If you really forget the meaning of each label in the future, you may wish to come back and look at the detailed information compiled for your riders!

Whether it is a commuter car or a racing car, oil plays a very important role in the operation of the engine.

Base oil structure

Depending on the base oil used, engine oil has different chemical properties, which are mainly divided into mineral oil, synthetic oil and fully synthetic oil. The package of mineral oil is usually marked "Mineral? Oil [multi], [multi] grade "signs, the chemical structure is relatively fragile, temperature and pressure resistance adaptability is insufficient, but the price is relatively cheap, suitable for riders with economic considerations; Marked "synthetic" and "semi-? Synthetic [synthetic]? Basic [synthesis]? The engine oil marked "technology" is synthetic oil, which is made by blending mineral oil and synthetic oil in a certain proportion. Base oil has a strong chemical structure, and the characteristics of the two base oils complement each other, which makes the engine oil more practical and "full"? Synthetic [100%] "Synthetic" means the synthetic composite oil generated by the chemical reaction of esters or synthetic oils in synthetic engine oil, which has excellent chemical structure. Although it can still play its best role under intense driving or other engine loads, its price is higher.

VROOAM mineral oil.

VROOAM synthetic oil.

SAE？ Viscosity code

In addition to its own LOGO, the most conspicuous signs on each bottle of engine oil package include 0W40, 5W50 and 10W40, which represent the viscosity grade of engine oil, also known as "serial number", and are formulated by the American Society of Automotive Engineers (SAE). Test the viscosity of engine oil at low temperature and high temperature, where "W" is winter? Winter means "low temperature viscosity", which is used to judge the difficulty of starting at low temperature. The lower the value, the lower the starting temperature, which is 0W respectively. 、5W？ 、 10W？ 、 15W？ 、20W、25W？ The latter number represents the oil film toughness in "high temperature environment", and the unit is100 c? The higher the flow index, the stronger the high temperature resistance, such as SAE? 20, 30, 40, 50, 60 and so on On the whole, the greater the viscosity range from low temperature to high temperature, the greater the use temperature range.

SAE mark is the viscosity code of engine oil.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.