What does the flash point of oil mean?
3 Answers
The flash point of oil is an indicator of its volatility. Below is the relevant introduction: Oil products: The lighter the fraction of the oil product, the higher its volatility, and the lower its flash point. Conversely, the heavier the fraction of the oil product, the lower its volatility, and the higher its flash point. Flash point: The flash point is also an indicator of the fire hazard of petroleum products. The hazard level of oil products is classified based on the flash point. Oil products with a flash point below 45°C are considered flammable, while those above 45°C are combustible. During the storage and transportation of oil products, it is strictly prohibited to heat the oil to its flash point temperature. For oils with the same viscosity, the higher the flash point, the better.
I often work on cars in the garage, and the term 'flash point' comes up frequently. Essentially, the flash point of oil refers to the temperature at which it emits a small flame when heated. For example, engine oil with a low flash point means it produces more vapor when heated, making it prone to ignition, which is dangerous for vehicles—especially in high-temperature environments where fire hazards may arise. I've seen older cars using engine oil with a relatively low flash point, emitting unpleasant smoke when the engine overheats. This not only affects driving comfort but also increases the risk of accidents. When selecting engine oil, it's important to check the flash point value. Generally, oils with higher flash points are safer because they are less prone to evaporation and maintain lubrication effectiveness longer. Every time I change the oil, I remind car owners to pay attention—don’t just focus on price or brand. Paying more attention to these parameters can significantly reduce the likelihood of breakdowns on the road. Choosing the right oil makes driving much more reassuring.
I find the flash point of oil quite crucial, which is the temperature point that determines whether the oil will ignite when tested during car repairs. For example, gasoline generally has a lower flash point than engine oil, around -40°C, so extra caution is needed when refueling in winter to avoid static sparks causing a fire. In my daily maintenance routine, a higher flash point means the oil is more stable and less prone to depletion, allowing the engine to run for longer distances and reducing the need for frequent repairs. If the flash point is too low, the oil evaporates more quickly, leading to faster oil level reduction over time and requiring frequent top-ups, which is both costly and environmentally unfriendly. I recommend car owners to schedule regular check-ups, such as changing the engine oil, and have the mechanic test the flash point to ensure it falls within the appropriate range. This simple step can help prevent car breakdowns and ensure a smoother driving experience.
