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How does synthetic ester lubricating oil extend the lifespan of an engine?
Classification: Company News
May 14,2025
How does synthetic ester lubricating oil extend the lifespan of an engine?
Traditional mineral oil is composed of C12-C24 alkane chains, with molecules linearly arranged. Chain breakage is prone to occur at high temperatures, resulting in a decrease in the viscosity index (VI) and the accumulation of oxidation products. Synthetic ester lubricating oil can be customized to construct a three-dimensional network molecular structure through chemical synthesis technology.
The carbonyl group (C=O) and ester group (-COO-) in the synthetic ester molecule endow it with strong polarity, which can form a chemical adsorption layer with the metal surface (the adsorption energy is 2-3 times higher than that of mineral oil). Under high-pressure conditions, it can still maintain an oil film thickness of 0.1μm, effectively isolating direct contact with the metal. By using the copolymerization technology of polyalpha-olefin (PAO) and polyol ester, the rigidity of the synthetic ester's molecular chain is increased by 60%. Under high-speed shear conditions (such as diesel engine crankcases), the viscosity attenuation rate can be controlled within 1%/1000h, which is much lower than 8%/1000h of mineral oil. By introducing aromatic rings, double bonds or heteroatoms (such as P, S), the molecular bond energy of the synthesized ester (approximately 500 kJ/mol) is 43% higher than that of mineral oil (350 kJ/mol). Under high-temperature conditions above 200 ° C, the oxidation induction period (OIT) can be extended to more than five times that of mineral oil.
#JD Lubricant Additives #Synthetic Ester Lubricating Oil # High-performance Lubrication
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