Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue[3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF …

Jul 29, 2024 · Diesel exhaust fluid, or DEF, is a key component in lowering pollutants emitted from diesel engines, helping to improve efficiency and reduce emissions.

Since the DEF (Diesel Exhaust Fluid) is introduced in the exhaust, also called after-treatment technology, the manufacturer is free to build as much power as they want. The DEF is stored …

Aug 1, 2025 · If you drive or work with modern diesel vehicles, you’ve probably heard about DEF, or Diesel Exhaust Fluid. But what is DEF exactly, and why is it so important?

DEF is not a fuel additive; instead, it is a precise mixture of urea and deionized water that is sprayed into the exhaust gas before entering the diesel engine’s SCR catalyst.

May 15, 2025 · Diesel Exhaust Fluid, commonly known as DEF, is a non-toxic liquid solution specifically engineered to minimize nitrogen oxide (NOx) emissions produced by diesel engines.

Aug 2, 2024 · Diesel Exhaust Fluid, or DEF, is comprised of de-ionized water and urea, a non-hazardous solution. Your favorite diesel vehicle releases NOx emissions into the air, and DEF …

Jun 26, 2025 · Learn what diesel exhaust fluid (DEF) is, how it works, and why it’s essential for reducing emissions and keeping modern diesel vehicles running efficiently.

Jul 4, 2025 · Diesel exhaust fluid (DEF) is a small part of your vehicle, but it plays a big role in keeping engines clean and compliant. In this guide, we’ll answer the most common questions …

Nov 1, 2023 · What Is DEF? DEF stands for diesel exhaust fluid, which you can find in many diesel-powered vehicles. It is an odorless, non-toxic solution made of pure automotive-grade …