Purchase gasoline engine oil grade SJ SM SN gasoline engine oil and choose Zhuolijia Tong as the lubricating oil for vehicles

Description :

Purchase gasoline engine oil grade SJ SM SN gasoline engine oil and choose Zhuolijia Tong as the lubricating oil for vehicles

Characteristics of gasoline engine oil lubrication and requirements for lubricating oil

　　High thermal load

　　Gasoline engines have high power and high speed (above 5000r/min), and are mostly air-cooled. Therefore, the thermal load is much higher than that of corresponding four stroke gasoline engines, and the surface temperature of the piston is very high. Lubricating oil is prone to form carbonaceous deposits at high temperatures. Causing ring sticking and cylinder pulling, therefore requiring lubricating oil to have excellent high-temperature cleanliness.

　　High mechanical load

　　Similar to the situation of thermal load, the mechanical load of gasoline engines is also significantly higher than that of corresponding four stroke gasoline engines. The cooling around the cylinder is uneven, with good cooling in the windward direction and poor cooling in the leeward direction during driving. Uneven thermal expansion and contraction cause cylinder deformation, making it easy to scratch and wear. Therefore, lubricating oil should have high oil film strength and extreme pressure performance.

　　Problems arising from the discharge of gasoline, engine oil, and fuel after combustion

　　Lubricating oil burns together with gasoline and is discharged from the exhaust pipe, which is a major difference between gasoline engines. Due to the heavy fraction of lubricating oil, a large amount of deposits are generated after combustion, which can pose the following hazards to the normal operation of the engine: these deposits can clog the exhaust port, causing poor intake and exhaust flow, thereby reducing output power; Deposits are generated on the spark plug electrode, causing cross connections, resulting in a decrease in power or even shutdown, and also reducing the lifespan of the spark plug; The high-temperature deposits in the combustion chamber cause premature ignition, disrupt the working program, and result in a decrease in power.

　　This requires low ash content in lubricating oil, soft combustion products, easy detachment and discharge, and pure ash free additives for high-power two-stroke gasoline engine oil such as outboard motor oil.

　　Gasoline engine oil has good smoke suppression performance

　　The inherent structure of gasoline engines results in incomplete fuel combustion compared to four stroke combustion, and the combustion and exhaust of lubricating oil also contribute to poor exhaust quality. Its emissions cause air pollution, and economically developed countries have established emission regulations. Therefore, how to improve the emission quality of two-stroke gasoline engines is a major issue for the survival of such models in the future. Of course, the main issue is the improvement of the engine, while also requiring lubricating oil to have good smoke suppression performance.

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• Gasoline engine oil grade