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Updated: 08 Oct 2025

10 Best Diesel Exhaust Fluids

#1
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AMTAST Hand Held DEF AdBlue Refractometer Tester for Urea Concentration in Diesel Exhaust Fluid Aqueous Urea Solution with ATC

Brand: AMTAST
$66.26
⭐ 4.1
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    Application: To measure urea concentration in diesel exhaust fluid/ AdBlue.
  • Easy to use: 1) Open the cover plate. 2) Clean and dry the surface of the prism. 3) Place 1-2 drops of solution onto prism. 4) Closed the prism cover plate, press the cover plate down lightly and read the value.
  • Convenient to carry: Pen shape design makes it portable to carry around. The fictional surface ensures not easy to slip off while holding.
  • Quality guarantee: Be made of high quality copper, not cheap aluminum. Solid and durable for a long-term usage.
  • ATC: Features automatic temperature compensation and will account for changes in ambient temperature and automatically compensate accordingly.
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#2
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Fundamentals of Medium/Heavy Duty Diesel Engines: .: .

Brand: No Brand
$283.86
⭐ 4.7
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    No features listed
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#3
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B3C Fuel Solutions DEF 7-040-9 Diesel-Exhaust-Fluid Contamination Test Strips (Pack of 100)

Brand: B3C Fuel Solutions
$167.17
⭐ 4.7
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    DEF 7-040-9 Contamination Test quickly detects contamination in diesel fuel, oil, gasoline, and other hydrocarbons
  • Keeping Diesel-Exhaust-Fluid (DEF) free of contamination is crucial to prolong the life of the SCR (Selective Catalytic Reduction) system
  • Maintain the quality of your DEF to avoid costly repairs or replacements of SCR components, and ensure compliance with environmental regulations
  • The DIP and DETECT Test Strips are simple to use. Just dip the test strip into the DEF tank and look for any color change, indicating contamination
  • Our DIP and DETECT test strip is a simple, fast, and inexpensive solution to safeguard your DEF system and optimize your fuel performance
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#4
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Diesel Exhaust Fluid DEF Injector 04627241AF Fit for RAM 2500 3500 4500 6.7L Diesel 2013 2014 2015 2016 2017 2018 2019 Diesel Exhaust Fluid DEF Injector Nozzle

Brand: AUGREX
$90.01
⭐ 4.6
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    Applicable Model: Diesel exhaust fluid DEF injector fit for RAM 2500 3500 4500 5500 6.7L Diesel 2013 2014 2015 2016 2018 2019, NOTE: please check whether the model is correct before purchase
  • Replace Part Number: 04627241AD, DFI3, 4627241AA, 4627241AB, 4627241AD, 4627241AE, 4627241AF, 04627241AA, 04627241AB, 04627241AD, 04627241AE, 04627241AF
  • Ingenious Design: The diesel exhaust fluid DEF injector nozzle has precisely wound and trimmed solenoid winding, which enables the computer to effectively control the transmission of diesel engine exhaust
  • Laser Injection Hole: Diesel exhaust fluid injector DEF all diesel engine injectors are separately injected by laser drilling injection holes to achieve the best injection preparation
  • Package: The diesel exhaust fluid DEF injector contains 1 * fuel injection nozzle, which is made of advanced materials and can resist extreme exhaust temperature to ensure normal operation during vehicle operation
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#5
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Valvoline Adblue Diesel Exhaust Fluid 10 Liter

Brand: Valvoline
$70.89
⭐ 4.2
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    Synthetic fluid for exhaust gas reduction in SCR-equipped diesel vehicles
  • Made from highly purified urea and ultrapure demineralized water
  • Reduces nitrogen oxide emissions to nitrogen and water in exhaust
  • Non-toxic, stable, and colorless, meeting stringent production standards
  • Suitable for cargo and passenger vehicles from leading manufacturers
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#6
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TotalEnergies AdBlue 15L - Diesel Exhaust Fluid (DEF)

Brand: TotalEnergies
$65.00
⭐ 4.4
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    Reduces Harmful Emissions TotalEnergies AdBlue lowers nitrogen oxide (NOx) emissions in diesel engines using SCR technology, helping meet Euro 5 and Euro 6 standards.
  • High-Purity Urea Solution 32.5% aqueous urea solution manufactured to ISO 22241 and DIN 70070 standards for optimal performance and compatibility.
  • Essential for SCR Systems Designed for diesel vehicles equipped with Selective Catalytic Reduction (SCR); not a fuel additive and must be used in the AdBlue tank.
  • Safe & Environmentally Friendly Non-toxic, non-flammable, and biodegradable. Safe to handle and store under recommended conditions.
  • Long Shelf Life & Easy Storage Can be stored for up to 18 months in original packaging between -5C and +30C, away from direct sunlight.
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#7
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CarbonTech AdBlue, 10L, diesel exhaust fluid (DEF)

Brand: Generic
$33.00
⭐ 4.4
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    Optimised Performance: Improves your diesel engine's efficiency and reduces emissions to meet Euro 6 standards.
  • High-Quality Formulation: Manufactured to ISO 22241 specifications, ensuring maximum purity and effectiveness.
  • Convenient Packaging: Easy-to-use 10L container with a spill-proof cap for hassle-free refilling.
  • Environmentally Friendly: Helps minimise your vehicle's environmental impact by optimising the SCR system.
  • Versatile Application: Suitable for use in all diesel vehicles equipped with an SCR system.
  • fully licensed by VDA:0004844
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#8
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CarbonTech AdBlue 10L x 2 Pack(20L), diesel exhaust fluid (DEF)

Brand: Generic
$57.00
⭐ 4.8
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    Optimised Performance: Improves your diesel engine's efficiency and reduces emissions to meet Euro 6 standards.
  • High-Quality Formulation: Manufactured to ISO 22241 specifications, ensuring maximum purity and effectiveness.
  • Convenient Packaging: Easy-to-use 10L container with a spill-proof cap for hassle-free refilling.
  • Environmentally Friendly: Helps minimise your vehicle's environmental impact by optimising the SCR system.
  • Versatile Application: Suitable for use in all diesel vehicles equipped with an SCR system.
  • fully licensed by VDA:0004844
  • Manufacturing Date: 2023-10-06. Quality Sampling Test Pass update: 2024-11-11 (Report Number: ACS2440449 by ACS Laboratories Australia)
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#9
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Castrol AdBlue Diesel Exhaust Fluid 1 Litre

Brand: Castrol
$11.56
⭐ 4.4
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    Castrol AdBlue is a high quality diesel exhuast fluid for use with modern vehicles that have a selective catalytic reduction system
  • Conforms to ISO 22241 and made under license from Verband der Automobilindustrie (VDA)
  • Innovative packaging that reduces the risk of spills (an important feature as AdBlue can cause damage to paintwork)
  • These international standards regulate manufacturers to ensure the quality of AdBlue
  • Using a low-quality product that does not follow this standard risks costly repairs
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#10
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2x10Kg AdBlue Diesel Exhaust Fluid DEF AUS32 Diesel Exhaust Gas Purifying Liquid 2 Bottles Value Pack…

Brand: AIKA
$54.99
⭐ 4.2
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    Quality Diesel Exhaust Fluid AUS32 AdBlue
  • Precise ratio
  • Ultra-high conversion
  • Long-term maintenance to prevent crystallization
  • Implementation of the standard ISO22241-1:2006 /GB29518-2013.
  • This product is suitable for all vehicles and mechanical equipment equipped with SCR system.
  • This product is the standard configuration of SCR technology.
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