The system works like this: exhaust gasses leave the engine after combustion and mix with DEF. The urea in the DEF interacts with the NOx emissions, causing a chemical reaction that changes the ...

While some of the first mainstream advancements in emissions-busting tech targeted gas-powered cars, the diesel industry is catching up, and today, new diesel vehicles are required to use DEF to ...

In this video, we explore the consequences of accidentally adding DEF fluid to a diesel tank, which contaminated the entire fuel system of a low-mileage truck. A professional assessment was ...

Under certain conditions, the water in DEF can evaporate, leaving behind white crystal urea deposits. Over time, these crystals can build up, clogging system components and interfering with normal ...