Is Synthetic Lubricant Really Good?
Synthetic lubricating oil is a kind of lubricating oil which is prepared by chemical synthesis and then prepared by blending or further processing. It includes synthetic esters, polyalphaolefin, polyether, silicone oil, etc. its composition is different from kerosene hydrocarbon. Semi synthetic lubricating oil refers to the lubricating oil made by mixing synthetic lubricating oil and mineral oil in a certain proportion. Because the raw materials of synthetic lubricants are expensive, the synthesis process is complex and the investment is high, the cost of synthetic lubricants and semi synthetic lubricants is generally higher than that of mineral lubricants.
Compared with mineral lubricating oil, synthetic lubricating oil has the following excellent characteristics:
(1) excellent viscosity temperature and low temperature fluidity
The viscosity index of synthetic oil is higher than that of mineral oil, and the viscosity changes little with temperature. Most synthetic lubricants have lower pour point (or pour point) than mineral oils at similar high temperature viscosities Low temperature viscosity. The same oil film requires that synthetic lubricating oil can be formed with lower viscosity to protect the engine. As a result, cars can be cut back At the same time, because of the short time needed for lubricating oil to flow to the friction surface, it can reduce the emission of engine components at the start The present dry wear phenomenon extends the service life of the engine.
(2) high temperature oxidation resistance of synthetic lubricating oil
The thermal oxidation quiet performance of synthetic lubricating oil is far better than that of mineral oil type engine oil, that is to say, the tendency of acid and sludge produced by oxidation is small. Under all kinds of bad operating conditions, The engine can provide proper lubrication and effective protection, so it has a longer service life and ensures the performance stability of the engine oil in the long service life.In a similar environment, synthetic lubricants have a much longer service life than mineral oils, so although they are of a higher original value, they are no longer Mineral oil is much higher.
(3) low evaporation loss of synthetic lubricating oil
Synthetic lubricating oil is a kind of pure compound with narrow boiling point, and its evaporation loss is much lower than that of mineral oil. It can reduce oil consumption, reduce exhaust emissions and extend the service life of catalytic converter. Compared with traditional mineral oil, synthetic oil has excellent chemical stability, good radioactivity resistance, high oil film strength and less foam. Therefore, synthetic oil is selected for ordinary high-grade cars.
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