
Diesel's flash point refers to the combustion limit of diesel, which is the temperature at which it starts to ignite when exposed to a flame under specified conditions. Here is some relevant information: 1. Diesel: The most important use of diesel is for diesel engines in vehicles and ships. Compared to gasoline, diesel has a higher energy density and lower fuel consumption rate. Due to its low energy consumption, some small cars and even high-performance vehicles have switched to diesel. 2. Flash Point Level: The flash point of diesel is mainly related to its volatility. The lighter the fraction, the easier it is to evaporate, and the lower the flash point. The lower the flash point of diesel, the more easily it can be ignited by a flame, increasing the risk of fire.

I've been driving diesel vehicles for over a decade and always pay close attention to the flash point issue. The flash point is the temperature at which diesel begins to vaporize. If it's below 60°C, the fuel vaporizes too quickly and can easily ignite upon contact with fire, which is extremely dangerous. According to national standards, such as China VI regulations, the flash point must not be lower than 60°C, otherwise it's considered substandard. I once used low flash point fuel and noticed a strong fuel odor after refueling. It nearly caused a small fire when parked, and I later found out its flash point was only 55°C. Using such fuel not only poses significant safety risks but may also clog fuel injectors over time and increase engine load. I recommend everyone stay vigilant when refueling—choose reputable gas stations and avoid cheap, inferior products. Safety should always come first.

When it comes to diesel flash point, I usually pay attention to fuel quality. A flash point below 60°C definitely fails to meet standards, as the new national benchmark has set this threshold. The previous China V standard only required 55°C, but a low flash point means higher diesel volatility, making it prone to ignition in hot weather or during transportation—many gas station explosions are caused by substandard flash points. I’ve seen oil depot leaks catching fire, mostly due to fuel with too low a flash point. Using high-quality fuel can also save some consumption since it burns more completely and delivers stronger power. Don’t take risks just to save a little money—it’s not worth it.

As a long-distance driver, I understand the importance of flash point. Diesel with a flash point below 60 degrees is substandard, as clearly stipulated by national standards. Using low flash point fuel is highly prone to ignition in summer or when pipes are blocked. I learned this lesson from an accident where strong fuel odor led to a fire, but fortunately, I managed to extinguish it in time. Since then, I only refuel with diesel that has a flash point above 60 degrees, which is much safer and more reliable.


