What is Diesel Exhaust Fluid?
Diesel exhaust fluid (DEF) is a combination of urea and deionized air. This fluid is essential for keeping a diesel engine running smoothly and provides a reduction of harmful contaminants, such as nitrogen oxide, that are released into the environment. When this fluid is allowed to run low, diesel vehicles suffer from reduced performance and may even cease to turn on until the tank is refilled. The Importance of Diesel Exhaust Fluid Diesel exhaust fluid helps to reduce the amount of pollution that is produced by medium and heavy-duty diesel engine exhaust systems. The SCR system injects the DEF into the exhaust, transforming harmful pollutants into clean air through a chemical reaction. DEF is not a fuel additive and it's stored in a separate tank. While it may seem like an inconvenience to spend money on an extra fluid, drivers of diesel trucks, buses, and heavy machinery need DEF to keep their vehicles running smoothly. Do All Diesel Vehicles Require Exhaust Fluid? Vehicle manufacturers began implementing selective catalytic [...]