BlueDEF Diesel Exhaust Fluid Synthetic Urea & Deionized Water, 1 Gallon Jug
BlueDEF Diesel Exhaust Fluid Synthetic Urea & Deionized Water, 1 Gallon Jug
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BlueDEF Diesel Exhaust Fluid Synthetic Urea & Deionized Water, 1 Gallon Jug

4.8 stars out of 1162 reviews
(4.8)|
1,162 ratings

Key item features

  • Mixture of 32.5 percent high purity synthetic urea and 67.5 percent deionized water
  • Helps convert nitrogen oxide into harmless nitrogen gas and water vapor for cleaner emissions
  • Improves fuel economy by up to 5 percent
  • Inject the fluid into your exhaust stream with a specialized dosing module
  • Stable, colorless, odorless, and meets ISO standards 22241 for purity and composition
  • Comes in 2.5-gallon jug
  • Specifications:
  • Boiling point: 212 degrees (Fahrenheit)
  • Crystallization point: 12 degrees
  • Dimensions (L x W x H): 7.2 x 3.9 x 11.8 inches
  • Weight: 37 pounds
Current price is $31.95
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4.8 out of 5 stars
stars1,162 ratings233 reviews
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Showing 1-3 of 233 reviews

Nov 5, 2025
Robert H
5 out of 5 stars review

Seller Verified Purchase

Reliable and great value!

BlueDEF works exactly as it should—keeps my truck running smooth with no issues. The price at Sam's is hard to beat, and the jug design makes it easy to pour without spills. Always consistent quality.

Review from samsclub.com
Helpful?3MJAI0TUA0Z619524367
Nov 8, 2025
Walmart customer
5 out of 5 stars review

Seller Verified Purchase

DEF

I've been using this kind of DEF in my trucks since 2018 and I've never had a problem I will continue to use it and recommend it. Sam's has the best price for it.

Review from samsclub.com
Helpful?3MJAI0TUA0Z619524367
Aug 14, 2025
Tammy
5 out of 5 stars review

Seller Verified Purchase

Great Brand

Great price and a bet good brand! My husband used it in his F350 when we are pulling our 5th wheel. Highly recommend.

Review from samsclub.com
Helpful?3MJAI0TUA0Z619524367