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BlueDEF Blue DEF 2.5 Gallon(s) Liquid Exhaust fluid

Name: BlueDEF Blue DEF 2.5 Gallon(s) Liquid Exhaust fluid
Brand: BlueDEF
SKU: 1000211209
Price: 17.98 USD
Availability: InStock
Rating: 4.7 (381 reviews)

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BlueDEF Diesel Exhaust Fluid is a mixture of high purity synthetic urea and deionized water that is used in Selective Catalytic Reduction (SCR) systems on diesel engines.

When injected into the exhaust stream and passed over a catalyst, BlueDEF helps convert NOx into nitrogen gas and water vapor, two harmless and natural components of the air we breathe
BlueDEF is stable, colorless and odorless, and meets ISO standards 22241 for purity and composition and is an American Petroleum Institute (PI) certified diesel exhaust fluid
These are the highest quality and safety standards in place to ensure optimum SCR performance
Vented nozzle helps glugging

General
Series Name	Blue DEF	Unit of Measure	Gallon(s)
Type	Exhaust fluid	Form	Liquid
Unit of Measure Quantity	2.5

Warranty
Warranty	90-day

Certifications
CA Residents: Prop 65 Warning(s)	No

Miscellaneous
UNSPSC	25191700

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Review

4.7 out of 5

381 Reviews

2 Star

93% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

What Customers Are Saying

Customers overwhelmingly praise the product's reliability and performance, with most noting years of trouble-free use in diesel vehicles. Reviewers consistently report it clears warning lights, prevents error codes, and matches dealer-supplied quality. Many highlight competitive pricing compared to other retailers, making it a preferred choice for regular buyers. Customers value the convenience of consistent availability and easy purchasing. A few mention isolated packaging issues like leaking containers, but these concerns are minimal and do not reflect the fluid's quality. Overall, reviewers strongly recommend it as a dependable, affordable solution.

Customer review summary generated by AI, including incentivized reviews.

381 Customer Reviews

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I hate having to use this !

California pushed their policies and stupid regs on the rest of the 49 states. It does NOTHING to emissions. All it does is erase the BLACK color in the exhaust. It does NOT get rid of it. Diesel has lower emissions than GAS .. that's why they didn't have to have emissions tests. It's so caustic that it can ruin your paint job. It adds to the cost of using a diesel to transport food and goods .. driving up the costs for farming and transportation and travel. It needs maintenance all the time. I...

BykergusSeptember 6, 2026
Verified Purchaser

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Would Not Recommend

This product (2gsllon container) last approx 5 mos. I’m quite satisfied, since the Going deemed this mandatory to fight pollution and other issues

Mecajunboy01September 4, 2026
Verified Purchaser

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10 Questions

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If I buy bulk do I get a discount

BlueDEF: Featured Videos

COMPARE PRODUCTS

		Name	Current Item BlueDEFBlue DEF 2.5 Gallon(s) Liquid Exhaust fluid
		Ratings	376
		UNSPSC	25191700
		CA Residents: Prop 65 Warning(s)
		Series Name	Blue DEF
Permatex The Right Stuff Type-1 High Temperature Gasket Maker 3 oz (Black)	BlueDEFBlue DEF Platinum 320 Fluid ounce(s) Liquid Diesel treatment	BlueDEFBlue DEF DEF002-2PK Diesel Exhaust Fluid - 2.5 Gallon Pack of 2	BlueDEFBlue Def DEF002-2PK Diesel Exhaust Fluid - 2.5 Gallon Pack for Efficient Emission Control	GUNK Non-Chlorinated Carburetor Parts Cleaner 12.5 fl oz - Case of 12 (M4815NC-12PK)	Bar’s LeaksBar's Leaks Block Seal Head Gasket Repair Sealant 20 oz	GIVIMO7.5-L Manual Transmission Fluid Pump with 8 ATF Adapters and 47-in Outlet Hose	Permatex Hybrid High-Strength Removable Threadlocker Orange 0.34 oz	CRC Chlorinated Mass Air Flow Sensor Cleaner 11 Oz Aerosol
	101				643
25191700	25191700	25191700	25191700	25191700	25191700	25191700	25191700	25191700

The Right Stuff.	Blue DEF Platinum	PEAK - DEF002 - 2/PACK #2	DEF002	M4815NC Non-Chlorinated Cleaner Series.	Automotive Cooling System Chemicals.		Permatex 25210 High-Strength Orange Threadlocker	Automotive Cleaning Supplies