
EN590 is diesel, a light petroleum product and a complex mixture of hydrocarbons, serving as fuel for diesel engines. Here is additional information: 1. Diesel: Diesel is primarily composed of diesel fractions produced through processes such as crude oil distillation, catalytic cracking, thermal cracking, hydrocracking, and petroleum coking. It can also be obtained from shale oil processing and coal liquefaction. 2. Diesel is categorized into: light diesel and heavy diesel, widely used in large vehicles, railway locomotives, and ships. 3. Diesel is graded by pour point: light diesel has six grades: 5, 0, -10, -20, -35, and -50; heavy diesel has three grades: 10, 20, and 30. Light petroleum products are complex hydrocarbon mixtures with carbon atom counts ranging approximately from 10 to 22.

When discussing diesel, we often mention EN590, which is the European standard specification for diesel fuel. It defines the quality parameters for automotive diesel, such as a sulfur content not exceeding 10ppm, which is crucial for environmental protection. Having driven diesel vehicles for over a decade, I've noticed that using this type of fuel makes the engine run quieter, and the exhaust fumes are less pungent. EN590 also sets requirements for lubricity, which helps protect high-pressure fuel pumps and extends engine life. Nowadays, many domestic gas stations' China VI diesel fuels actually reference this standard, making it important to choose compliant stations for long-distance trips.

EN590 is essentially the unified quality benchmark for diesel in Europe. The most crucial aspect is controlling sulfur content, with ultra-low sulfur reducing exhaust pollution, which I fully agree with. In fact, it also regulates the cetane number, affecting engine starting performance. I always remind car owners during repairs that using the wrong fuel can clog the particulate filter, costing thousands to fix. Nowadays, domestic refineries are also adopting similar standards, but it's important to distinguish between EN590 and marine diesel, as the latter has much looser specifications.

This is a diesel fuel quality standard. Its most notable feature is ultra-low sulfur content (≤10mg/kg), and it also specifies indicators such as density, lubricity, and flash point. Diesel vehicles using this fuel can reduce nitrogen oxide emissions and are more compatible with DPF and SCR systems. In fact, the upgraded EN590 standard in 2014 added biodiesel blending requirements, and many gas stations in Europe indicate compliance with this standard.

When repairing diesel vehicles, EN590 fuel issues are often encountered. Its key indicators include sulfur content control, cold filter plugging point, cetane number, etc. Nowadays, Euro 6 engines must use this type of fuel, otherwise the exhaust treatment system is prone to failure. I once encountered a case where the owner added inferior fuel, completely clogging the fuel injectors, resulting in expensive cleaning costs. When choosing fuel, check if the gas station indicates compliance with standards—don't ruin your car to save a few cents.


