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The basic basis of engine oil: what it is and what types exist.
Motor oil is the foundation of a long and happy life for any car engine. It not only lubricates the engine's moving parts but also helps to distribute the temperature evenly, cleans the engine, and prevents the formation of deposits. The basis of motor oils is made up of base oils. In this article, we will explore what base oils are, the different types of base oils available, and their differences.
What are base oils?
Engine oil consists of two parts: base oil and an additive package. Base oils are the foundation of any engine oil. They make up the bulk of the oil and determine its fundamental properties. Base oils are classified based on their purity, viscosity, and other characteristics that affect engine performance.
The main types of base oils.
There are three main types of base oils: mineral, synthetic and semi-synthetic. Mineral oils are a product of crude oil refining and are the most affordable and widespread. Synthetic oils are a product of chemical synthesis. They are able to provide higher requirements for such properties of the oil as: its oxidation, evaporation, solidification and durability. Semi–synthetic oils are a mixture of mineral and synthetic oils. They combine the properties of both previous types, offering a good value for money.
API classification of base oils
The system of quality standards and requirements for motor oils developed by the American Petroleum Institute – API will help us to understand the types of base oils.
Base oils are divided into several groups:
Base oils of group I are ordinary mineral oils.;
Base oils of group II – highly refined mineral oils;
Group III base oils are synthetic oils obtained by hydrocracking (the most affordable method of processing mineral base);
Group IV base oils are Polyalphaolefins (PAO);
Group V base oils are esters.
Group III, IV, and V base oils are synthetic base oils. They have properties that are not available in mineral oils, but are necessary for modern engines.
Group I base oils
This is a type of base oils that are obtained by the method of selective purification and dewaxing of oil. Group I base oils usually contain a lot of impurities, including sulfur, and are rarely used for the production of motor oils, as a large content of impurities will not allow the oil to meet the requirements of modern specifications. But due to the relatively simple production and affordable cost, the group of base oils remains a very popular product. They are the basis for transmission and hydraulic oils, as well as in industrial and marine lubricants.
Group II base oils
These are improved mineral oils that have undergone hydrotreatment, a process that reduces the amount of sulfur, nitrogen, and other impurities and increases the saturation of hydrocarbons. These base oils can be used both independently, for the production of mineral oils, and as part of a mixture with synthetic base oils, for the production of semi-synthetic motor oils.
Group III base oils
Produced by the method of catalytic hydrocracking of mineral oils - a process of processing using hydrogen and special catalysts, which makes them not only more pure, but also bring their physical properties to another level, available only to synthetic base oils. At the moment, motor oils based on group III base oils are the most common type of synthetic base oils in the automotive market.
Group IV base oils (Polyalphaolefins)
Synthetic base oils that are produced by polymerization of alpha olefins. They do not originate directly from petroleum, but are synthesized from gaseous hydrocarbons such as ethylene. Polyalphaolefins offer the highest level of performance, with exceptional thermo-oxidative stability, chemical stability, high viscosity-temperature properties, and do not deposit on engine components when heated. They are ideal for extreme operating conditions, such as racing cars or modern high-powered engines.
V Group Base Oils (Esters)
Esters are another type of fully synthetic base oil that is produced by a reaction between an alcohol and an acid. These oils have excellent lubricating properties and high chemical stability. They are often used in the aviation and space industries, as well as in high-performance automotive and motorcycle engines. Esters can improve the oil's adhesion to metal surfaces, providing better protection against wear and corrosion.
In conclusion, I would like to note that each group of base oils has its own advantages and can be used depending on the specific requirements of the engine and operating conditions. Today, when producing motor oils, it is almost impossible to use only one group of base oils as the base, as each group has its own limitations and disadvantages.
Engine oil consists of two parts: base oil and an additive package. Base oils are the foundation of any engine oil. They make up the bulk of the oil and determine its fundamental properties. Base oils are classified based on their purity, viscosity, and other characteristics that affect engine performance.
The main types of base oils.
There are three main types of base oils: mineral, synthetic and semi-synthetic. Mineral oils are a product of crude oil refining and are the most affordable and widespread. Synthetic oils are a product of chemical synthesis. They are able to provide higher requirements for such properties of the oil as: its oxidation, evaporation, solidification and durability. Semi–synthetic oils are a mixture of mineral and synthetic oils. They combine the properties of both previous types, offering a good value for money.
API classification of base oils
The system of quality standards and requirements for motor oils developed by the American Petroleum Institute – API will help us to understand the types of base oils.
Base oils are divided into several groups:
Base oils of group I are ordinary mineral oils.;
Base oils of group II – highly refined mineral oils;
Group III base oils are synthetic oils obtained by hydrocracking (the most affordable method of processing mineral base);
Group IV base oils are Polyalphaolefins (PAO);
Group V base oils are esters.
Group III, IV, and V base oils are synthetic base oils. They have properties that are not available in mineral oils, but are necessary for modern engines.
Group I base oils
This is a type of base oils that are obtained by the method of selective purification and dewaxing of oil. Group I base oils usually contain a lot of impurities, including sulfur, and are rarely used for the production of motor oils, as a large content of impurities will not allow the oil to meet the requirements of modern specifications. But due to the relatively simple production and affordable cost, the group of base oils remains a very popular product. They are the basis for transmission and hydraulic oils, as well as in industrial and marine lubricants.
Group II base oils
These are improved mineral oils that have undergone hydrotreatment, a process that reduces the amount of sulfur, nitrogen, and other impurities and increases the saturation of hydrocarbons. These base oils can be used both independently, for the production of mineral oils, and as part of a mixture with synthetic base oils, for the production of semi-synthetic motor oils.
Group III base oils
Produced by the method of catalytic hydrocracking of mineral oils - a process of processing using hydrogen and special catalysts, which makes them not only more pure, but also bring their physical properties to another level, available only to synthetic base oils. At the moment, motor oils based on group III base oils are the most common type of synthetic base oils in the automotive market.
Group IV base oils (Polyalphaolefins)
Synthetic base oils that are produced by polymerization of alpha olefins. They do not originate directly from petroleum, but are synthesized from gaseous hydrocarbons such as ethylene. Polyalphaolefins offer the highest level of performance, with exceptional thermo-oxidative stability, chemical stability, high viscosity-temperature properties, and do not deposit on engine components when heated. They are ideal for extreme operating conditions, such as racing cars or modern high-powered engines.
V Group Base Oils (Esters)
Esters are another type of fully synthetic base oil that is produced by a reaction between an alcohol and an acid. These oils have excellent lubricating properties and high chemical stability. They are often used in the aviation and space industries, as well as in high-performance automotive and motorcycle engines. Esters can improve the oil's adhesion to metal surfaces, providing better protection against wear and corrosion.
In conclusion, I would like to note that each group of base oils has its own advantages and can be used depending on the specific requirements of the engine and operating conditions. Today, when producing motor oils, it is almost impossible to use only one group of base oils as the base, as each group has its own limitations and disadvantages.