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    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    AdBlue® is a high-purity, 32.5% aqueous urea solution used in diesel engines with Selective Catalytic Reduction (SCR) technology to reduce harmful nitrogen oxide (
    NOxcap N cap O sub x
    𝑁𝑂𝑥
    ) emissions by converting them into nitrogen and water. It is essential for compliance with modern emissions standards, particularly for vehicles registered after 2015. 
    Key Aspects of AdBlue®: 
    • Composition: Composed of 32.5% technical-grade urea and 67.5% deionized water.
    • Usage: It is stored in a dedicated tank and injected into the exhaust gases, not mixed with diesel.
    • Consumption: Consumption varies based on driving style and vehicle type, but generally requires refilling every 10,000 miles or 6 months, often sooner for heavy vehicles.
    • Components: Vehicles with SCR systems, often labeled with "BlueHDi," "BlueTec," or "SCR," require this fluid.
    • Storage: AdBlue should be kept out of direct sunlight and in a cool, dry place to prevent decomposition, as described in this Diesel exhaust fluid - Wikipedia article. 
    Common Questions: 
    • What if I run out? The vehicle will likely not start or will enter a reduced-power "limp" mode until refilled.
    • Can I mix it with diesel? No, putting AdBlue in the fuel tank causes significant damage to fuel pumps and injectors.
    • Is it dangerous? It is classified as the lowest risk transportable liquid. 
    Disclaimer: The information above is for informational purposes only. Always consult your vehicle's manual. 
    • Diesel exhaust fluid - Wikipedia
      In the international standard defining DEF (ISO 22241), it is referred to as AUS 32 (aqueous urea solution 32%). DEF is also sold ...
      Wikipedia
    • ISO 22241 AdBlue® urea fluid for diesel engine 5L
      AdBlue® 5L per bottle, 4 bottles in a carton and made with 32.5% high-purity urea and 67.5% deionized water which is better to low...
      Guangzhou EverBlue Technology Co.,Ltd.
    • How to protect the exhaust system of modern series diesel ...
      Mar 4, 2026 — The liquid urea solution AdBlue®, also known as diesel exhaust fluid (DEF), is dosed in diesel vehicles with exhaust gas treatment...
      Liqui Moly
    • What is AdBlue? Why does your car need it? | RAC Drive
      Feb 25, 2026 — It is recommended that AdBlue is added to your diesel engine every 10,000 miles or every 6 months, whichever comes first. In gener...
      RAC
    • Does ad blue destroy diesel engines? : r/Diesel
      Nov 7, 2023 — According to a post on r/Diesel, AdBlue only affects the exhaust and doesn't affect the engine unless it's in the fuel tank: * **I...
      Reddit
    • AdBlue®: What it is and how it works | Motorists - TotalEnergies UK
      Does my car need AdBlue? If your car is a diesel, there is a high chance it will require AdBlue®. If you're unsure, consult your v...
      TotalEnergies UK website
    • Diesel exhaust fluid - Wikipedia
      In the international standard defining DEF (ISO 22241), it is referred to as AUS 32 (aqueous urea solution 32%). DEF is also sold ...
      Wikipedia
    • ISO 22241 AdBlue® urea fluid for diesel engine 5L
      AdBlue® 5L per bottle, 4 bottles in a carton and made with 32.5% high-purity urea and 67.5% deionized water which is better to low...
      Guangzhou EverBlue Technology Co.,Ltd.
    • How to protect the exhaust system of modern series diesel ...
      Mar 4, 2026 — The liquid urea solution AdBlue®, also known as diesel exhaust fluid (DEF), is dosed in diesel vehicles with exhaust gas treatment...
      Liqui Moly
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    My Ad Center
    Videos
    The AdBlue you should use to prevent a breakdown.
    YouTube · ADVANCED FLEET MANAGEMENT TUBE
    1 week ago
    YouTube · ADVANCED FLEET MANAGEMENT TUBE
    9:06
    Always use manufacturer-authorized AdBlue & anti-crystallization additives that meet ISO 22,241 to prevent costly SCR system repairs.
    ADVANCED FLEET MANAGEMENT TUBE
    YouTube·
    Apr 13, 2026

    The AdBlue you should use to prevent a breakdown.

    YouTube·ADVANCED FLEET MANAGEMENT TUBE·Apr 13, 2026
    YouTube
    Why AdBlue / Urea Is Required in Diesel Vehicles | Explained ...
    YouTube · The Automotives By M-KAT
    Dec 19, 2025
    YouTube · The Automotives By M-KAT
    1:38
    The Automotives By M-KAT
    YouTube·
    Dec 19, 2025

    Why AdBlue / Urea Is Required in Diesel Vehicles | Explained ...

    YouTube·The Automotives By M-KAT·Dec 19, 2025
    YouTube
    Diesel Exhaust Fluid/AdBlue - Why Your New Diesel May Not ...
    YouTube · Simmo's Home Workshop
    Jan 11, 2025
    YouTube · Simmo's Home Workshop
    8:26
    AdBlue, or DEF, is 67.5% deionized water and 32.5% urea. Vehicles won't run without it to meet Euro 6 emissions.
    Simmo's Home Workshop
    YouTube·
    Jan 11, 2025

    Diesel Exhaust Fluid/AdBlue - Why Your New Diesel May Not ...

    YouTube·Simmo's Home Workshop·Jan 11, 2025
    YouTube
    In this video
    • 00:00
      Introduction
    • 00:15
      Diesel emission controls Euro 6
    • 00:55
      Why do we need AdBlue / DEF?
    • 01:25
      How a catalytic converter / D.O.C works
    • 02:07
      How a DPF works / regeneration
    • 03:50
      AdBlue / Diesel Exhaust Fluid
    • 04:25
      How AdBlue works
    • 05:03
      How much AdBlue do I need?
    • 05:40
      What happens if I run out of AdBlue?
    • 06:40
      Drawbacks of AdBlue / Diesel Exhaust Fluid
    View all
    People also ask
    Are DEF and AdBlue the same thing?
    Diesel Exhaust Fluid (DEF), also known as AUS 32 or AdBlue, is a non-toxic, clear, and colorless liquid composed of 32.5% high-purity urea and 67.5% deionized water.Jun 26, 2025

    Adblue Diesel Exhaust Fluid (DEF) & Its Importance | Fleetguard Filtrum


    Fleetguard Filtrum
    https://www.fleetguard-filtrum.com › resources › blog
    Fleetguard Filtrum
    https://www.fleetguard-filtrum.com › resources › blog
    What does AdBlue do to diesel engines?
    AdBlue is a diesel exhaust fluid that works with your vehicle's emission control system to dramatically reduce harmful pollutants. Despite its name suggesting it's blue, AdBlue is actually a clear, colourless liquid composed of high-purity synthetic urea (32.5%) dissolved in demineralised water (67.5%).

    AdBlue Guide for Triton Diesel Owners - Mitsubishi Motors


    Mitsubishi Motors
    https://www.mitsubishi-motors.com.au › what-is-adblue
    Mitsubishi Motors
    https://www.mitsubishi-motors.com.au › what-is-adblue
    What does urea do for diesel engines?
    UREA enables the SCR chemical emissions-reduction process that neutralizes NOx, protects air quality, and ensures compliance with strict diesel emissions standards without affecting engine reliability or vehicle operation, sustaining clean diesel mobility and environmental responsibility through catalytic conversion ...

    Why UREA is used in diesel engines cars and trucks and at what level


    American Petroleum
    https://americanpetroleumpr.com › urea-in-diesel-engines
    American Petroleum
    https://americanpetroleumpr.com › urea-in-diesel-engines
    Is AdBlue basically water?
    AdBlue® is made of a colourless mixture of high-purity urea (32.5%) and deionised water (67.5%), as set out in the ISO 22242 standard. Urea contains ammonia; the active ingredient in AdBlue® that reacts with NOx and neutralises it before it enters the atmosphere.

    AdBlue®: What it is and how it works | Motorists - Total Energies UK


    Total Energies UK
    https://totalenergies.co.uk › adblue-what-it-is-how-it-works
    Total Energies UK
    https://totalenergies.co.uk › adblue-what-it-is-how-it-works
    Discussions and forums
    Does ad blue destroy diesel engines?
    Reddit · 
    r/Diesel
     · 20+ comments
     · 2 years ago
    Does ad blue destroy diesel engines?
    Reddit · 
    r/Diesel
     · 20+ comments
     · 2 years ago
    Ad Blue is just a urea/water mix injected into the exhaust so that NOx reacts with NH3 over an SCR. I suppose you could have injectors foul ...  More
    What is AdBlue, and why is it important for modern diesel trucks? How do ...
    Quora · 
    3 answers
     · 5 months ago
    What is AdBlue, and why is it important for modern diesel trucks? How do ...
    Quora · 
    3 answers
     · 5 months ago
    A brand of diesel exhaust fluid. DEF is a ammonia and water based liquid that when sprayed ...  More
    Top answer · 5 months ago
    Sounds like a new type of DEF according to what I see online, it is a DEF alternative ...  More
    5 months ago
    What is an adblue into diesel? How to prevent it from misfuelling?
    Quora · 
    3 answers
     · 3 years ago
    What is an adblue into diesel? How to prevent it from misfuelling?
    Quora · 
    3 answers
     · 3 years ago
    Your adblue shouldn’t cause any kind of misfuelling if that’s what you’re asking. If ...  More
    Top answer · 2 votes · 3 years ago
    AdBlue is for exhaust aftertreatment. It doesn’t I go into or interact with the diesel ...  More
    2 votes · 3 years ago
    Add blue is a brand name of diesel exhaust fluid, strangely enough it's clear. It doesn't ...  More
    3 years ago
    See more
    Popular products
    • BlueDEF Platinum Diesel Exhaust Fluid 2.5 gal deg002.
      Nearby, 13 mi
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    • Audi AdBlue Diesel Exhaust Fluid.
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    • MANNOL AdBlue urea solution for diesel exhaust gas cleaning DIN 70070, 2 x 10 liters.
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    Web results

    AdBlue® Fluid - The Facts, the Myths & its Usage


    Nationwide Fuels
    https://www.nationwidefuels.co.uk › oil-guides › adblu...
    Nationwide Fuels
    https://www.nationwidefuels.co.uk › oil-guides › adblu...
    AdBlue is a highly purified diesel exhaust fluid (DEF) with the official name AUS32 which stands for Aqueous Urea Solution 32.5%.Read more

    Diesel exhaust fluid


    Wikipedia
    https://en.wikipedia.org › wiki › Diesel_exhaust_fluid
    Wikipedia
    https://en.wikipedia.org › wiki › Diesel_exhaust_fluid
    Diesel exhaust fluid is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made ...Read more

    What is AdBlue? Why does your car need it?


    RAC
    https://www.rac.co.uk › ... › Emissions
    RAC
    https://www.rac.co.uk › ... › Emissions
    Feb 25, 2026 — AdBlue is an aqueous urea solution that helps reduce harmful emissions from diesel engines. ... Can diesel engines run without AdBlue? No ...Read more

    How to protect the exhaust system of modern series diesel ...


    Liqui Moly
    https://www.liqui-moly.com › Home › Tips and topics
    Liqui Moly
    https://www.liqui-moly.com › Home › Tips and topics
    Mar 4, 2026 — We explain what you need to know about AdBlue® and how to prevent expensive repairs. Newer-generation diesel vehicles require urea in addition to fuel.Read more

    Adblue (urea) diesel fuel additive explained | AutoExpert John ...


    YouTube · Auto Expert John Cadogan
    352.4K+ views · 8 years ago
    YouTube · Auto Expert John Cadogan
    352.4K+ views · 8 years ago
    8:39
    The chemical called AdBlue goes into your diesel engines exhaust and fewer toxic emissions come out that's what it does.
    6 key moments6 key moments in this video
    From 02:43
    What is AdBlue?
    From 03:30
    What is urea?
    From 05:11
    How does Adblue work?
    From 05:38
    Is any AdBlue compatible with Mercedes?
    From 06:00
    What does Mercedes-Benz say?
    From 06:18
    Can I use non-Mercedes AdBlue?
    Auto Expert John Cadogan
    YouTube·
    Oct 27, 2017

    Adblue (urea) diesel fuel additive explained | AutoExpert John ...

    YouTube·Auto Expert John Cadogan·Oct 27, 2017
    YouTube
    In this video
    • 02:43
      What is AdBlue?
    • 03:30
      What is urea?
    • 05:11
      How does Adblue work?
    • 05:38
      Is any AdBlue compatible with Mercedes?
    • 06:00
      What does Mercedes-Benz say?
    • 06:18
      Can I use non-Mercedes AdBlue?

    AdBlue® Urea Diesel Exhaust Fluid (DEF) 10 Liter


    Guangzhou EverBlue Technology Co.,Ltd.
    http://www.everbluesolution.com › Other products
    Guangzhou EverBlue Technology Co.,Ltd.
    http://www.everbluesolution.com › Other products
    AdBlue® is a liquid solution used by some diesel engines with selective catalytic reduction (SCR) to lower nitrogen oxide (NOx) emissions. Item NO.: EB10LA.Read more

    What Is Adblue® And Why Does It Matter?


    Valvoline™ Global
    https://www.valvolineglobal.com › ... › Articles
    Valvoline™ Global
    https://www.valvolineglobal.com › ... › Articles
    AdBlue® is a diesel exhaust fluid. It represents a blend of urea and deionized water. When the vehicle's engine is working, small amounts of AdBlue® are ...Read more
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    Experimental investigation of the effect of urea addition to ...


    ScienceDirect.com
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    ScienceDirect.com
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