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 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.

Aug 17, 2024 · What is AdBlue (aka diesel exhaust fluid - DEF) In a nutshell, AdBlue is a liquid substance that can be used in diesel engines with selective catalytic reduction.

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?

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 …

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 …

AdBlue is a diesel exhaust fluid (DEF) used in Selective Catalytic Reduction (SCR) systems to reduce harmful nitrogen oxide (NOx) emissions in diesel engines. It is composed of 32.5% urea and 67.5% …

If you've seen bottles of AdBlue at filling stations and wonder what it's for and whether your car needs it, our guide will tell you everything you need to know.

Jan 26, 2025 · Find out everything you need to know about "what is adblue" - from its composition to correct use. This guide clarifies the most important facts about exhaust gas purification