What is the quality standard for diesel fuel?
2 Answers
Currently, the diesel fuel quality standard in the market mainly adopts the national standard GB19147-2016. Below is the relevant content introduction: 1. Specifications: Light diesel can be divided into 7 grades according to the freezing point: 10#, 5#, 0#, -10#, -20#, -35#, and -50#. 2. Diesel: Diesel is refined from petroleum within the temperature range of 260-350℃, mainly composed of carbon, hydrogen, and some oxygen. Diesel is divided into heavy diesel and light diesel based on the distillation fraction. Heavy diesel is suitable for medium and low-speed diesel engines below 1000r/min, while light diesel is suitable for high-speed engines above 1000r/min. The most fundamental difference lies in the sulfur content, with light diesel having a sulfur content not exceeding 0.2%, and automotive diesel not exceeding 0.035%.
I've been driving a diesel pickup for seven or eight years, and I'm most concerned about the parameters of the China VI standard. The sulfur content in China VI diesel from regular gas stations must be less than 10 milligrams per kilogram, which is 500 times finer than a strand of hair. The cetane number must be at least 51 to ensure ignition speed. When transporting goods in Northeast China during winter, you need to choose a grade below -20, with a freezing point lower than -20 degrees Celsius to prevent waxing. A few days ago, my cousin used unregulated fuel, and the engine's fuel injectors got completely clogged, costing over 8,000 yuan in repairs. Remember, the density should be between 0.82 and 0.86 grams per cubic centimeter—fuel that's too thin won't provide enough power.
