NüDEF Diesel Exhaust Fluid Anti-Crystal Treatment - Treats 25 Gallons - DEF Additive & Stabilizer
Condition: New
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Availability:
In Stock.
Arrives
Friday, Mar 6
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Number of Items: 1
Features
- Helps prevent DEF crystallization
- Lowers freezing point of DEF
- Protects SCR system DEF tank, pump & injector
- Treats up to 25 gallons of DEF
Manufacturer: NuDEF
Brand: NuDEF
Model: NuDEF
Item Weight: 10.2 ounces
Product Dimensions: 2 x 2 x 6.5 inches
Item model number:
Manufacturer Part Number:
Date First Available: June 3, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Mar 6
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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- Financing through Apple Pay
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Top Amazon Reviews
Number of Items: 1
If you drive a diesel that requires DEF you need this product now! It will save you hundreds to thousands of $$ because it prevents urea nidus crystals from forming. Once you have urea crystallization in your DEF tank it will always continue to be a problem. NuDEF breaks down the urea crystals that form. This reduces the use of DEF your vehicle is forced to cycle through by the sensors that monitor urea crystal formation. It saves you money on DEF and fuel. And it protects your vehicle.
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Reviewed in the United States on August 21, 2025 by Scott Cold
Number of Items: 1
I've been frustrated with my truck's DEF system for some time now...It seems that DEF fluid is wildly unstable (something they really don't tell you when buying a truck) and as a result, I've experienced my share of DEF system failures. Even when adding DEF fluid as recommended, the volatility of DEF fluid creates a seemingly perfect environment for DEF systems to fail when driving a diesel-powered truck like mine. A friend suggested I try using NuDEF...I was skeptical but figured I had nothing to lose. The dreaded DEF system light had returned again and before making yet another trip to my local dealership to once again be charged a fortune for a repair, I tried it. Wow! After mixing in NuDEF with my DEF fluid and driving for a short period of time, my DEF system light went off and my truck seemed to be a bit...happier! It's now been a few weeks and I have yet to see the DEF system light return and my truck has been performing perfectly. Thanks, NuDEF...You DEFinitely (see what I did there) have a customer for life!
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Reviewed in the United States on August 13, 2024 by DLS
Number of Items: 1
Before, I was getting an error warning saying the DEF quality was insufficient. No restarts after 250 miles. So I purchased a code scanner and reset the code. Error came on again after 100 miles or so.. I tried a local repair shop and they said “dealer only repair” wouldn’t touch it. Here’s the Great News! I purchased this product and have had No problems since. This bottle has saved me from expensive repair bills. Thanks!
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Reviewed in the United States on August 11, 2025 by Brandon Brandon
Number of Items: 1
You know, I don't know if this stuff works or not, but I can see the DEF crystals around my DEF tank inlet. If this stuff does what the manufacturer and the other reviews say it will, it's worth the cost. I have a 2015 and 2024 Ram 2500, both with the 6.7L diesels, so I started putting this in both of their DEF tanks when I fill up. Time will tell.
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Reviewed in the United States on May 26, 2025 by Ken
Number of Items: 1
geeat
Reviewed in the United States on February 13, 2026 by Shakhribonu Barakaeva
Number of Items: 1
Was getting the P207F code. Sucked the all old DEF out of the truck best I could and refilled with blue def platinum along with a dose of nudef. Took about 50 miles but cleared up the code.
Reviewed in the United States on June 3, 2025 by Brabunch
Number of Items: 1
I’m using this for the last 3 months. I assume it is working because well, how do you know? Shipping was fast and price was the best I could find
Reviewed in the United States on July 31, 2025 by Johnnie Lugnuts
Number of Items: 1
I did not know this existed. I tried it and am a believer. No DEF issues since.
Reviewed in the United States on June 29, 2025 by Kurt