The 7 Best Def Exhaust Fluids (2022 reviews)

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Are you looking for collection of best def exhaust fluids ? Your search ends here.

Our review process:

Our Top Picks:

Best Overall:
Buy: Blue Def Def Exhaust Fluid
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Best For Mb Bluetec Cars:
Buy: Bluedef Def Exhaust Fluid
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Best For Good Stuff:
Buy: Acdelco Def Exhaust Fluid
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Best For Fuel Efficiency:
Buy: Prime Guard Def Exhaust Fluid
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Best With Fuel Mileage:
Buy: Dpf Remedy Def Exhaust Fluid
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Best For Affordable Price:
Buy: Prestone Def Exhaust Fluid
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Best For Car:
Buy: Adams Polishes Def Exhaust Fluid
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Best Overall: Blue Def Def Exhaust Fluid

Blue Def Def Exhaust Fluid
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The Blue Def Def Exhaust Fluid is capable of outshining several other fluids featured in this list in overall features. The blue def def exhaust fluid does the job and it works as advertised. Make sure this fits by entering your model number. These are the highest quality and safety standards in place to ensure optimum scr performance.

The fluid is great with fast shipping and it is very good. Also, the fluid is one of the key elements of the selective catalytic reduction (scr) process used by most medium and heavy-duty engine builders to meet epa 2010 regulations. Finally, the blue def def exhaust fluid can be used in a scr system will reduce the levels of nox emissions of those engines.

Almost all buyers opine that the fluid is easy to use funnel. Also, a few say that the fluid can be used in all diesel engines. Moreover, a few say that the fluid works for an audi q7.

Top Customer Quotes:
  • This works for all diesel cars.
  • This is good for all vehicles that require it.
  • This will work for any diesel engine required.
  • One gallon of is used approximately every 300 miles.

Best For Mb Bluetec Cars: Bluedef Def Exhaust Fluid

Bluedef Def Exhaust Fluid
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The Bluedef Def Exhaust Fluid's high-end materials make sure that it ages well with use. The bluedef def exhaust fluid can get for the same price and it works fine. Make sure this fits by entering your model number. These are the highest quality and safety standards in place to ensure optimum scr performance.

Finally, the bluedef def exhaust fluid price is great and it is very good.

Almost all customers found that the fluid works well but pricey because of shipping. Also, they also found that the fluid is important in the winter because it will freeze at 12*f. The tank is heated, so freezing is not an issue. In addition, they also found that the fluid is as good as the m-b brand and a lot more reasonably.

Top Customer Quotes:
  • This is great for the 2012 Passat TDI and 2014 Dodge cummins.
  • It is easy to fill the tank on a ram with cummings diesel.
  • Helps convert nitrogen oxide into harmless nitrogen gas and water vapor for cleaner emissions.
  • This is the very same stuff needed and required by Benz, audi, Porsche and vw.

Best For Good Stuff: Acdelco Def Exhaust Fluid

Acdelco Def Exhaust Fluid
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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate fluid. The Acdelco def exhaust fluid is exactly that - it's a simple fluid that hits all the right notes. The Acdelco Def Exhaust Fluid is a mixture of high purity synthetic urea and deionized water and is classified as minimum risk for transportation. From adhesives, sealants, and cleaners to lubricants, waxes, and paints, Acdelco has all you need to keep your gm or non-gm vehicle looking and performing great. Also, it is strong and it is easy to pour.

Above all, the acdelco def exhaust fluid includes vented nozzle(s) that make pouring easy by helping to prevent glugging.

Almost all buyers agree that the fluid can be used in any diesel system which requires def. In addition, they say that the fluid is covered under warranty but do save a few extra bucks on a $45, 000 truck, get the good stuff. Moreover, they say that the fluid has a two - year shelf life. Without any doubt, this product passed the test and had very satisfied buyers eager to share their experience.

Top Customer Quotes:
  • These are 2 2.5 gallon jugs.
  • This is kept in air-conditioning storage and is fresh, will be very fresh at 75.
  • This is used to help convert nox, an environmental pollutant, into harmless nitrogen and water.
  • There is only one but the package says it is 48 lbs.

Best For Fuel Efficiency: Prime Guard Def Exhaust Fluid

Prime Guard Def Exhaust Fluid
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For a low asking price, Prime Guard Def Exhaust Fluid has managed to overwhelm their customers by packing as many features as they could. The prime guard defexhaust fluid is a safe, environmentally friendly solution for selective catalytic reduction. Prime guard ultrapure diesel exhaust fluid (def) is an excellent way to improve your vehicle’s fuel efficiency, lower maintenance costs, while also ensuring your vehicle meets or exceeds all EPA standards. And, the fluid is an ultrapure, formaldehyde-free, nox reducing treatment specifically formulated for diesel engines equipped with scr systems.

Most importantly, the prime guard def exhaustfluid includes a dispensing nozzle for an easy pour.

Why We Like This:
  • This is api certified, guaranteeing the quality and suitability for proper scr operation.
  • Good investment for the long term.

Best With Fuel Mileage: Dpf Remedy Def Exhaust Fluid

Dpf Remedy Def Exhaust Fluid
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The Dpf Remedy Def Exhaust Fluid is capable of outshining several other fluids featured in this list in overall features in its price range. The dpf remedy for exhaust fluid is a dpf regeneration cycle. Make sure this fits by entering your model number. In addition, the fluid is high, a regen is necessary.

The fluid is great with fuel mileage and it works as advertised. Moreover, this reduces def (diesel exhaust fluid) consumption. Above all, the DPF remedy for exhaust fluid is illegal by federal law, has large fines and equipment can be impounded.

"Product works great. " - says, one customer. In short, buyers found this to be one of the best fluids for daily purposes.

Why We Like This:
  • This is noticeable and it is easy to use tablets.
  • This is unburned fuel and the dpf collects it.
  • Protects your engine; reduces exhaust soot; continuously cleans fuel system and injectors.
  • This is eliminated as much as 90.

Best For Affordable Price: Prestone Def Exhaust Fluid

Prestone Def Exhaust Fluid
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The Prestone Def Exhaust Fluid gives the top-tier fluids a run for their money by offering flagship specs at a much more affordable price. The prestone def exhaustfluid is made of stainless steel or high density polyethylene. Diesel exhaust fluid (def) is a consumable and essential fluid for maintaining selective catalytic reduction (scr)-equipped modern diesel engines. Further, the fluid is a safe, easy-to-handle, nontoxic solution of 67.5% water and 32.5% automotive grade urea.

The fluid is formulated with high quality urea and demineralized water to work with all scr. Lastly, the prestone defexhaust fluid is strong and it works as advertised.

Almost all customers opine that the fluid is way more expensive than filling up at the pump. Also, a few strongly agree that the fluid can be used in Mercedes benz. In short, the tone of buyers is very positive and we believe that the fluid suits the purpose.

Top Customer Quotes:
  • This works well, saves lots of money.
  • Compatible with adblue and other DEF products.
  • Formulated to work with all scr-equipped diesel engines.
  • Check the owner’s manual for proper usage of your vehicle.

Best For Car: Adams Polishes Def Exhaust Fluid

Adams Polishes Def Exhaust Fluid
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The Adams Polishes Def Exhaust Fluid's material feels more premium than its price would suggest. The adams polishes def exhaust fluid is used in diesel engines with selective catalytic reduction technology to help meet strict emissions standards set by the EPA and cepa for diesel emissions standards. H2blu premium synthetic urea def fluid improves gas efficiency, allowing your diesel exhaust system to operate at peak performance every time you drive your vehicle. This diesel exhaust system additive def fluid is certified by the American petroleum institute and is committed to only offering the maximum purity and performance.

The fluid is critical as impurities will cause the fluid to not work properly. Also, this is a premium quality product, ensuring purity and performance. Above all, the adams polishes def exhaust fluid has reduces pollution and it is perfect for ultra high quality.

Why We Like This:
  • As a result, your engine performance and fuel efficiency are maximized.
  • Manufacturer says: we test it at various stages throughout the manufacturing and delivery process.
  • The manufacturer says: we didn't make it this far by being normal.
  • It has partnered with h2blu to offer products under the hood.