Engine oil plays multiple functions such as cleaning, lubricating, and conducting in the engine. If the choice is unreasonable, it will have a negative impact on the use of the engine and the output of power. Therefore, the correct selection of engine oil is very important for the use of the engine.
Now only take the CD-grade engine oil used in single-cylinder diesel engines as an example: engine oil grades are divided into CC, CD, CF, etc., and the same grade of engine oil is divided into multiple models. For example, CD-grade engine oil is divided into single-grade 30, 40, 50, multi-stage type is divided into 10w-30, 15w-40, 20w-50 and other models. These models are divided according to the optimum oil viscosity that should be used at the corresponding temperature in different seasons. For example: Type 30 engine oil is designed for the use of locomotives in winter, and has a low viscosity. When the locomotive is first started, the viscosity of the engine oil is low, and the resistance is small, and the car will be light in winter. Type 50 is designed for summer, and its viscosity is relatively high, which is conducive to the formation of oil film between parts of the locomotive in summer under high temperature conditions, reducing wear and tear, prolonging the service life of parts and maximizing the efficiency of the engine.
Although the multi-grade engine oil can adapt to a wider temperature range, its price is higher. Due to the small span of the operating area and the small change in temperature difference, small agricultural machinery should mainly use single-grade oil. In addition, since the locomotives with single-cylinder diesel engines are mostly small, there is no need to use engine oil above CD level, because theoretically speaking, CC level is the standard oil for this type of locomotive. The lubrication effect of the components is optimal.In addition, due to the different models of diesel engines and gasoline engines, there is a big difference in the oil used. Therefore, when choosing engine oil, you must recognize the model to avoid unnecessary economic losses caused by misuse.
