Diesel Engine User Guide

According to the national standard (GB252-87), light diesel oil specifications are divided into six grades according to the pouring point: 10, 0, -10, -20, -35 and -50, which respectively indicate that the pouring point is not higher than 10℃, 0℃, -10 ℃, -20℃, -35℃ and -50℃; the higher the grade, the lower the freezing point.
Diesel is a special fuel used in compression ignition engines (i.e. diesel engines). Diesel appears as a water-white, light yellow or tan liquid. Diesel is divided into two types: light diesel and heavy diesel. Light diesel is used as fuel in high-speed diesel engines above 1000r/min, while heavy diesel is used as fuel in medium- and low-speed diesel engines below 1000r/min. The diesel sold in general gas stations is light diesel. The standard for light diesel products is GB 252-2000 "Light Diesel" standard. In this standard, the grades of diesel are divided into No. 10, No. 5, No. 0, No. -10, No. -20, No. -35, and No. -50. The classification of diesel grades is based on the freezing point of diesel.
The cold filter plugging point is an important indicator for measuring the low-temperature performance of light diesel. It can reflect the actual low-temperature performance of diesel and is closest to the actual minimum operating temperature of diesel. When selecting a diesel grade, users should consider both the local temperature and the cold filtering point corresponding to the diesel grade. The cold filtering point of No. 5 light diesel oil is 8°C, the cold filtering point of No. 0 light diesel oil is 4°C, the cold filtering point of No. 10 light diesel oil is -5°C, and the cold filtering point of No. 20 light diesel oil is -14 ℃.