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.

AdBlue is a liquid that’s added to diesel vehicles exhaust to help reduce harmful exhaust emissions (NOx). It turns harmful pollutants into harmless gases that do less damage to the environment.

Nov 7, 2025 · AdBlue is the brand name of a diesel exhaust fluid that’s owned by the German Association of Automotive Industry. It’s not a fuel additive but is meant to be used with newer diesel …

Feb 25, 2026 · What is AdBlue? AdBlue is diesel exhaust fluid that is designed to help vehicles meet the latest Euro emission standards. It is commonly found in Euro 6 diesel vehicles, newly registered from …

AdBlue® is an aqueous solution designed exclusively for diesel vehicles fitted with a selective catalytic reduction (SCR) system. This technology has enabled diesel vehicle manufacturers to comply with …

Nov 26, 2025 · AdBlue is a diesel exhaust fluid (DEF) that helps reduce a diesel vehicle’s NOx exhaust emissions. It’s stored in a tank with a blue filler cap, which is separate from the fuel tank.

Jul 6, 2025 · You've surely heard of brake fluid, fuel, and lots of other liquids needed to run a diesel vehicle. But what's AdBlue fluid? And do all diesel vehicles need it?

May 20, 2025 · AdBlue®, a diesel exhaust fluid (DEF), plays a vital role in helping diesel vehicles meet stringent emission standards. This guide delves into what AdBlue® is, how it works, and why it’s …

Mar 7, 2025 · Discover how AdBlue reduces diesel emissions, how SCR works, and why AdBlue is essential for Euro 6 compliance. Learn refilling tips and best practices.

Jan 22, 2022 · What is AdBlue and how does it work? AdBlue is what we call a Diesel Exhaust Fluid (DEF). It is made from distilled water and high grade aqueous automotive urea. It is a fairly harmless …