Diesel exhaust fluid - Wikipedia
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 …
What Is DEF and How Does It Work? - MotorTrend
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.
Diesel Exhaust Fluid (DEF) Guide: Uses, Risks & Storage
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 …
What Is Diesel Exhaust Fluid (DEF) and Why Does Your Truck ...
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?
Diesel Exhaust Fluid: What It Is, How It Works & Importance
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.
What is Diesel Exhaust Fluid? How Does DEF Fluid Work | 2025 ...
Apr 2, 2024 · Diesel Exhaust Fluid (DEF) is a non-toxic, colorless liquid made of urea and deionized water. It’s injected into the exhaust stream of diesel engines to break down harmful …
Diesel Exhaust Fluid Explained: What Is DEF & Why It Matters
Dec 9, 2025 · Learn what Diesel Exhaust Fluid (DEF) is, how it works, and why it’s essential for reducing emissions and improving diesel engine efficiency.