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Are you driving a brand new car, or are you driving a car that has been around for a long time and you wonder if the engine oil you are using is suitable for your vehicle? At this post, UNIOIL We would like to share with customers the information on how to choose the right engine oil for new or old cars to thereby helping customers choose some engine oil products The right fit helps your vehicle achieve high performance and safety, thereby reducing vehicle maintenance costs.
1. What is engine oil? Classification of engine oil
In order to choose the correct engine oil for your car, you must first understand what engine oils are, their uses and classifications.
Uses of engine oil: have 3 main functions: lubricating, cooling and cleaning
High or low viscosity oil, single grade or multigrade ?
According to the classification system of SAE ( American Society of Automotive Engineers ), for multi-grade lubricants , after the SAE symbol are the numbers and letters interleaved such as 10W-30, 15W-40…In which, letters The first number indicates the lowest temperature at which the engine can still start normally.
Next, the index after the letter “W” is the important one. This number represents the viscosity of the oil . The oil will thicken the higher the index. On the market today, we most often meet those with indexes 30, 40 and 50.
Mineral oil, semi-synthetic or synthetic?
These are the three common oils used in motor oils, classified as follows:
- Group I, II, III oils are mineral base oils. Although also produced from crude oil, Group III is sometimes included in the category of synthetic oils
- Group IV, V oils are synthetic oils
- Fully Synthetic Oil: Oil made entirely from Polyalphaolefin (PAO) base oils.
- Synthetic oils – These can be made from a Group III “synthetic” base oil or a Group IV (PAO) synthetic.
- Synthetic blend – It is a mixture of crudely refined mineral base oil and synthetic base oil.
- Semi-synthetic oil – is an oil that uses a combination of conventional and synthetic base oils in its formulation.
What are the quality grades of the lubricant?
The quality of motor oils is classified according to API ( American Petroleum Institute ) .
The letter “S” stands for gasoline engine and “C” stands for diesel engine. The higher the back letter, the better the quality level
2. How to choose the right engine oil for old and new cars?
Based on the above information about engine oil, choosing the right engine oil for your car is not a simple thing, especially for old cars, or have been used for a long time.
Older cars and motorbikes or those that have been used for a long time over 5 years, even 10 years often have larger gaps between pistons and cylinders than new models. The cause may be due to incomplete processing techniques of older cars or vehicles that have been used for a long time with the engine worn out, increasing the gaps in the engine.
According to statistics, up to 60% of vehicles in traffic have a speedometer of only 120,000 km. With the growth of the market, many refineries and laboratories have developed oils for older vehicles with high mileage. Many additives are added to enhance the engine’s internal flexibility and not affect other components.
Therefore, the engine oil requirement for older vehicles has a higher viscosity than that of new models. If the viscosity is too low, it will not be enough to seal the piston, not enough to create a thin film for lubrication, increase equipment wear, as well as waste fuel due to incomplete combustion.
For new vehicles with high working efficiency, or high operating speed, which requires low viscosity oil, has good thermal and oxygen stability, it is preferable to use semi-synthetic base oils or Synthetic oils for best performance
In addition, depending on the type of terrain moving of the vehicle also affects the choice of oil accordingly. For example, cars often go long distances often, with high speeds, so they should choose denser oil than cars that often travel in city areas. Because the oil in the engine is always at high temperature when running long distances, the viscosity decreases, so the oil needs to have a high enough consistency to form a lubricating film in such conditions.
EPILOGUE:
Through the article UNIOIL has compiled information about some characteristics of engine oil and how to choose engine oil for old and new cars. If you have any questions , you can comment at the end of the article. write or call us directly for answers.
UNILUBRICATION – PREMIUM LUBRICANTS
Hotline: 0938 809 226
Email: info@unilubrication.com
Website: www.uniolubrication.com