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Engine Oil Additive Has A Variety Of Functions Aug 14, 2017

Is the Engine Oil Additive?

Now the production of the car, the engine design life in more than one million kilometers. Normal maintenance run a few hundred thousand kilometers is not a problem, do not believe you look at the taxi odometer to know.

In addition, it should be emphasized that: in the engine, the oil is actually play a lubrication, cooling, cleaning effect, if you add a lubricant,Engine Oil Additive then this oil is not a waste? In addition, if the chemical composition in the additive and the chemical composition of the oil chemical reaction may also play a reaction, it is more worthless.

Lubricant is the base oil and additives, oil companies from the refinery to buy base oil, and then add some additives, made of the final finished lubricants. In order to meet the various machinery in different conditions of use under the lubrication requirements, the current lubricants usually contain a variety of additives. Some oils contain only rust inhibitors, but most lubricants contain a variety of additives, such as automotive engine lubricants (oil).

In general, the additive plays three roles in the lubricating oil: protecting the base oil, improving the performance of the base oil, and protecting the friction surface. Different additives play a different role, and some additives have a variety of functions, these additives used in combination, it is necessary to improve the overall performance of lubricants, but also to maintain chemical balance,Engine Oil Additive so not the most good, the amount of different additives have a proper value.

In the development of oil, the formula of additives is also breaking through. For example, in the 1950s, Pennzoil Z-7 was a more classic oil formulation, Z-7 was an acronym, representing seven additive formulations in oil: 1) pour point depressants; 2) antioxidants; 3) 4) anti-rust anti-corrosion agent; 5) clean / dispersant; 6) anti-wear agent; 7) anti-foam agent.

When the oil technology to today,Engine Oil Additive the above seven kinds of additives are still in use, but now the oil additive composition is more complex, in addition, the same additive product technology also achieved a replacement. As the engine operating conditions more harsh, environmental protection departments also made fuel-efficient requirements of the car, so now the oil in the energy saving and antioxidant performance better than the old formula. In order to help us understand the current oil formulations, we look at ILSAC GF-5 oil additives typical formula, ILSAC GF-5 is the latest oil quality specifications.

1. Viscosity Index Improvers (Viscosity Index Improvers)

The effect of the viscosity index improver is to improve the viscosity index of the oil. The higher the viscosity index of the lubricating oil, the viscosity change in the temperature can be relatively stable, the lower the viscosity index, the oil viscosity is more susceptible to temperature.

The viscosity index improver is an oil-soluble chain polymer. The solubility of these polymers in the oil is more sensitive to temperature changes. At low temperatures, the polymer has less solubility in the oil and a smaller molecular chain. When the temperature rises, the solubility increases,Engine Oil Additive the molecular chain is stretched to increase the molecular friction inside the oil, become sticky, and the viscosity of the oil increases - if there is no viscosity index improver, the temperature increases under normal conditions The viscosity will be reduced. And joined the viscosity index improver, low temperature oil viscosity does not increase, can maintain good mobility. The viscosity index improver at high temperatures acts as a thickening agent to maintain the stability of the oil viscosity, so some people turn the viscosity index improver as a tackifier.

Shear stability is an important indicator of the viscosity index improver, because the viscosity index improver in the engine operation will be subject to mechanical rolling and shear,Engine Oil Additive especially in the case of high shear rate, viscosity index modifier molecular chain May be cut, affecting the effect of thickening, resulting in temporary or permanent decline in oil viscosity.

In order to meet the energy requirements of oil, some of the latest oil use low viscosity base oil to produce oil, such as SAE 0W-20, the future may also have lower viscosity of the oil, which on the viscosity index improver made new requirements.