1. Diesel engine oil is used for compression ignition internal combustion engine. In terms of performance requirements, it is selected according to the speed, average effective pressure or enhancement coefficient. Diesel engines are divided into low-speed and high-speed engines. Ordinary diesel engine oil can be used for supercharging of low-speed engines, and high-speed, high supercharging and high enhancement coefficient diesel engines must use high-grade diesel engine oil. High speed diesel engine means that the pressure of piston ring acting on the cylinder wall is as high as 3-4mpa when the rotation speed is above 1000r / min. under such harsh conditions, the diesel engine has strict requirements on lubricating oil, and high-quality lubricating oil must be used. In addition, the exhaust smoke of diesel engine is 10 times higher than that of lead-free gasoline engine. The smoke adsorbs the decomposition products of zinc disulfide phosphate, reducing the anti-wear effect of zinc disulfide phosphate, Therefore, there are more clean and dispersed anti-wear additives than gasoline engines.
2. Viscosity is the main index of diesel engine selection. The test shows that on medium load diesel engines, when the piston speed is 100 ℃, the viscosity of 12-16 engine oil is used. On small high-speed diesel vehicles, the viscosity of 6-8mm2 / s diesel engine oil is used in winter, and the viscosity of 10-14mm2 / S diesel engine oil is used in summer.
3. Quality grade selection: diesel engine oil with good heat resistance, oxidation resistance and stability is the main performance of diesel engine oil.
Some components in diesel engine oil are oxidized to form oxides, organic acids, hydroxyl acids, nitrides, asphalt and coke, which are the main reasons for engine corrosion and wear. Therefore, diesel engine oil cannot be selected blindly.
The above is the detailed introduction of long-term diesel engine oil. I hope it will help you. If you have any questions, please contact us. We will provide you with services with a professional attitude https://www.smxnykj.com/