What is Diesel Exhaust Fluid? - The News Wheel
What is Diesel Exhaust Fluid? Photo: Chevrolet If you drive a diesel-powered vehicle, you’ll have some unique maintenance tasks to keep track of. Unlike gas-powered cars, diesel trucks have a smog-cutting system that sprays diesel exhaust fluid, abbreviated as DEF. Here’s a look at what you need to know about DEF. What does DEF do? DEF cuts down on the pollution produced by diesel trucks. When diesel fuel combusts, it produces toxic chemicals called oxides of nitrogen, often abbreviated to NOx. DEF is sprayed into the exhaust, causing a chemical reaction that turns dangerous NOx into harm...