(4 pack) Rislone DEF Crystal Clean Diesel DEF & SCR Emissions System Cleaner Diesel Exhaust Fluid, 11.8 oz
(4 pack) Rislone DEF Crystal Clean Diesel DEF & SCR Emissions System Cleaner Diesel Exhaust Fluid, 11.8 oz
Hero image 0 of (4 pack) Rislone DEF Crystal Clean Diesel DEF & SCR Emissions System Cleaner Diesel Exhaust Fluid, 11.8 oz, 0 of 16

(4 pack) Rislone DEF Crystal Clean Diesel DEF & SCR Emissions System Cleaner Diesel Exhaust Fluid, 11.8 oz

4.8 stars out of 484 reviews
(4.8)|
484 ratings

Key item features

  • Avoid Costly DEF System Repairs
  • Improves Emission Component Life
  • Restores SCR Selective Catalyst Reduction Performance
  • Works with all UREA DEF / AdBlue Fluids
  • 11.8 oz
  • Item 4784
  • Vehicle Make: Universal
Current price is $79.04$19.76/ea
Price when purchased online
  • Free shipping
  • Free 90-day returns

How do you want your item?

Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.
How do you want your item?
Columbus, 43215
Arrives by Tomorrow
Sold and shipped by Walmart.com
Free 90-day returns - in store or online
This item is gift eligible

This item includes:

  • 4-pack of Rislone DEF Crystal Clean Diesel DEF & SCR Emissions System Cleaner Diesel Exhaust Fluid, 11.8 oz
walmart plus

Get free delivery, shipping and more*

*Restrictions apply

About this item

Product details

Specifications

Warnings

Customer ratings & reviews

4.8 out of 5 stars
stars484 ratings443 reviews
How item rating is calculated

Reviews summary

Pros

  • : Clear directions make it easy to use.
  • : Maintains or improves def system functionality and efficiency.
  • : Helps maintain car efficiency and clear trouble codes.
  • : Allows easy pouring and cleaning of the system.
  • : Operates well with infrequent long-distance use.
  • : Offers great value at this cost.
Generated by AI

Customer photos

  • +41 images
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 443 reviews

Mar 13, 2026
Swani
5 out of 5 stars review

Worked awesome on my Duramax 3.0

My emissions light came on in my 2022 GMC Sierra Denali 1500 3.0. I had NAPA hook up their diagnostic reader and it was giving code P2BAA. I wanted to see how well the Rislone DEF Crystal Clean worked, so I pulled my DEF injector and soaked it in the Cystal Clean. I couldn't believe how well it dissolved the all the crystals and even removed a large amount of soot. I reinstalled my DEF injector dumped the bottle of the Crystal Clean in the DEF tank amd drove my pickup for 30 min and all the lights and codes cleared up. Great stuff and saved me a ton of money from having to bring it in to the mechanic. I'll be running this stuff ever 5k miles from now on.

Review from Rislone
Helpful?58Q21YDMIYA118956255758
Jan 12, 2026
Melmike
5 out of 5 stars review

Rislone products are great!

[This review was collected as part of a promotion.] I have a 2019 chevy 3500hd duramax with 183,000 miles. Engine light come on and to it to get it checked. Was told to buy this product. I used it and drove for 2 days to work and around town. After 2 days Engine light went off....I'd recommend these, ALL Rislone to anyone I talk to....

Review from Rislone
Helpful?58Q21YDMIYA118956255758
Jan 13, 2026
Walmart customer
5 out of 5 stars review

Great product

I bought this about three weeks ago and I’m thankful that I did. I had a maintenance light come on and after googling it, I learned that you are suppose to use a de crystallizer in your Diesel exhaust fluid. After purchasing this product and running a couple days, my Maintenance light went off and code cleared.

Review from Rislone
Helpful?58Q21YDMIYA118956255758