If you're like most drivers, you probably think diesel fuel looks the same no matter where you buy it. But if you're also like most drivers, you don't know how to identify dyed diesel fuel.
Diesel fuel can be dyed in a variety of colours, but the most common is black. So if you see diesel fuel that's not black, be suspicious. You may be getting your dyed diesel fuel from a source other than a reputable gas station or truck stop.
If you're like most drivers, you probably don't give a second thought to diesel fuel. But if you're in the market for a new car or truck, be aware that some diesel fuel is dyed to make it look more like gasoline.
The dye is usually made from petroleum distillates and solvents, which can cause respiratory problems, headaches, nausea and even vomiting in people who are sensitive to them. In extreme cases, the dye can even cause cancer.
To identify dyed diesel fuel, look for these telltale signs:
-A yellowish colour
-A fruity odour
-Poor performance in cold weather
If you see diesel fuel that is dyed a different colour than regular diesel fuel, it's most likely not just a coincidence. Some diesel refiners are using a process called "colour enhancement" to make their fuel look more attractive to buyers and improve its blending potential.
This technique involves adding chemicals and solvents to the diesel fuel to create a new colour. The most common dyes used for this purpose are carotenoids, which are derived from plants.