---
product_id: 603801989
title: "4784 DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz"
brand: "rislone"
price: "170.55 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Rislone"
url: https://www.desertcart.tn/products/603801989-4784-def-crystal-clean-diesel-def-and-scr-emissions-system
store_origin: TN
region: Tunisia
---

# Safe with DOC, DPF, SCR & DEF systems Use every 5,000 miles for peak performance Targets SCR system deposits 4784 DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz

**Brand:** rislone
**Price:** 170.55 DT
**Availability:** ✅ In Stock

## Summary

> 🚛 Keep your diesel running clean, lean, and mean with Rislone DEF Crystal Clean!

## Quick Answers

- **What is this?** 4784 DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz by rislone
- **How much does it cost?** 170.55 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/603801989-4784-def-crystal-clean-diesel-def-and-scr-emissions-system)

## Best For

- rislone enthusiasts

## Why This Product

- Trusted rislone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Warranty-Safe Formula:** Works seamlessly without voiding your vehicle’s new manufacturer warranty—drive worry-free.
- • **Plug & Play Application:** Simply add to your DEF tank’s blue cap—no mechanic needed, no diesel fuel contamination risk.
- • **Crystal Clear Efficiency:** Dissolves white crystallization deposits that clog your SCR system, restoring engine power and fuel economy.
- • **Mileage-Optimized Maintenance:** Designed for regular use every 5,000 miles to prevent costly DEF system failures and keep emissions clean.
- • **Universal Diesel Compatibility:** Compatible with all major DEF fluids including AdBlue, AUS 32, BlueTEC, and more—perfect for any diesel ride.

## Overview

Rislone 4784 DEF Crystal Clean is a specialized emissions system cleaner formulated to dissolve harmful crystallization deposits in diesel SCR systems. Safe for use with all DEF fluids and emissions components like DOC, DPF, and SCR devices, it restores engine efficiency and reduces DEF consumption. Regular use every 5,000 miles prevents buildup, protects your vehicle’s warranty, and keeps your diesel truck or SUV running at peak performance.

## Description

RISLONE® DEF CRYSTAL CLEANTM Diesel DEF & SCR Emissions System Cleaner is a propriety blend of DEF (Diesel Exhaust Fluid) / AdBlue® compatible cleaning agents and surfactant detergents specifically designed to be safe to use and work on SCR (Selective Catalyst Reduction) systems. DEF Crystal Clean gives a cleaning effect on the entire SCR system by working to dissolve the white crystal deposits that form in the tank, pump, heater, sender, lines, injector, decomposition tube / reactor and mixer. These deposits can interfere with the normal operation of the SCR emissions system and engine, increasing fuel consumption and reducing engine power. This reduced power can lead to operating in limp mode where the vehicle will drive slowly, or become undrivable. This process restores function and with regular use maintains efficiency of the SCR. DO NOT ADD TO DIESEL FUEL TANK. INSTRUCTIONS: DEF Crystal Clean is specifically designed to only be installed in the Diesel Exhaust Fluid / AdBlue tank which usually has a blue cap. Do not add to the diesel fuel tank. * Light Truck or Mid-Size to Large SUV - 5 to 9 gallon tank capacity install full bottle into DEF tank. *Car or Small SUV - 3 to 5 gallon tank capacity use approximately 1/2 bottle. *Medium and Heavy Duty Diesel Trucks - 10 to 20 gallon tank capacity use 2 bottles. Pour DEF Crystal Clean into mostly full DEF tank or add and fill tank with diesel exhaust fluid. If light is still on after 250 miles or a few days of driving, second application may be required, or mechanical attention is needed. NOTE: Works with all approved diesel exhaust fluids. Some vehicles use a special filling adapter to install DEF / AdBlue into the tank. For those vehicles use special funnel or pour into mostly empty DEF / AdBlue bottle and install in system.

Review: 2016 Ram 1500 Ecodiesel DEF Consumption - We have a 2016 Ram 1500 Ecodiesel and prior to using this product I was eating up half a tank of DEF every month. I ran back to back bottles and started using the DEF at our local Fry’s store. The DEF consumption went down dramatically. Folks, this stuff really works. We are having to fill the DEF every two months now. Fantastic product and works extremely well.
Review: This product works! - I bought a used 2021 F250 with 75k miles. At first it was drinking DEF. I used 3/4 of a tank on a 900 mile road trip. I used this product on the first tank on my 5900 mile move to Alaska from Virginia. The first 3/4 tank of DEF, with the product in it, got me to Indianapolis, about 800 miles. The second tank I started using the Rislone DEF Treatment in every box I put in the truck, it got me to Mitchell, SD which was about 1000 miles and I used half a tank. About 1200 miles later I put 1 box of DEF in before I crossed into Canada, and stocked up on 3 boxes knowing I had about 3k more to go. Keep in mind, I'm hauling a 20ft enclosed trailer full of all my earthly possessions, and I have quite a few tools and heavy things. Something happened after that first 3k miles. I made it the next 3k miles and only used 1/2 tank. Now when I fill up it says 7500 miles to empty. I don't know if that's true, but it's been a long time since I've had to buy DEF.

## Features

- Excellent for diesel vehicles driven regularly at slow speeds, low loads, short durations or make frequent stops as these are more prone to having the problem of crystallization deposit build up in the SCR system.
- Regular use every 5,000 miles not only keeps the system clean, but works to prevent the white crystallization issues from returning.
- Will not void manufacturer’s new vehicle warranty. Specifically designed and safe to use on vehicles which have DOC catalytic converters, DPF particulate filters, SCR selective catalytic reduction devices, ASC ammonia slip catalyst or DEF / AdBlue systems.
- Works with all AdBlue, Aria 32 (Automotive Nitrogen Oxide Liquid Reducing Agent), AUS 32 (Aqueous Urea Solution), BlueHDi, BlueTEC, Cummins, DEF UREA, Duramax, EcoDiesel, PowerStroke, TDI Clean Diesel, and many more.
- DEF Crystal Clean is specifically designed to only be installed in the Diesel Exhaust Fluid / AdBlue tank which usually has a blue cap. Do not add to the diesel fuel tank.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CRSY78LR |
| Best Sellers Rank | #4,362 in Automotive ( See Top 100 in Automotive ) #18 in Fuel System Cleaners |
| Brand | Rislone |
| Brand Name | Rislone |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.5 out of 5 stars 525 Reviews |
| Included Components | (1) DEF and SCR Treatment |
| Item Form | Liquid |
| Item Type Name | Diesel DEF & SCR Emissions System Cleaner |
| Item Volume | 11.8 Fluid Ounces |
| Manufacturer | Bar's Products |
| Material Feature | Scented |
| Material Features | Scented |
| Model Number | 4784 |
| Number of Items | 1 |
| Part Number | 4784 |
| Scent | Unique |
| Size | 1 Fl Oz (Pack of 1) |
| Special Features | Automotive |
| Specific Uses For Product | Automotive DEF additive |
| Surface Recommendation | Automotive |
| UPC | 078615047840 |
| Unit Count | 1.0 Fluid Ounces |
| Warranty Description | Please see manufacturer |

## Images

![4784 DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz - Image 1](https://m.media-amazon.com/images/I/71hRUzjYRyL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 2016 Ram 1500 Ecodiesel DEF Consumption
*by T***Y on January 25, 2026*

We have a 2016 Ram 1500 Ecodiesel and prior to using this product I was eating up half a tank of DEF every month. I ran back to back bottles and started using the DEF at our local Fry’s store. The DEF consumption went down dramatically. Folks, this stuff really works. We are having to fill the DEF every two months now. Fantastic product and works extremely well.

### ⭐⭐⭐⭐⭐ This product works!
*by M***D on November 17, 2025*

I bought a used 2021 F250 with 75k miles. At first it was drinking DEF. I used 3/4 of a tank on a 900 mile road trip. I used this product on the first tank on my 5900 mile move to Alaska from Virginia. The first 3/4 tank of DEF, with the product in it, got me to Indianapolis, about 800 miles. The second tank I started using the Rislone DEF Treatment in every box I put in the truck, it got me to Mitchell, SD which was about 1000 miles and I used half a tank. About 1200 miles later I put 1 box of DEF in before I crossed into Canada, and stocked up on 3 boxes knowing I had about 3k more to go. Keep in mind, I'm hauling a 20ft enclosed trailer full of all my earthly possessions, and I have quite a few tools and heavy things. Something happened after that first 3k miles. I made it the next 3k miles and only used 1/2 tank. Now when I fill up it says 7500 miles to empty. I don't know if that's true, but it's been a long time since I've had to buy DEF.

### ⭐⭐⭐⭐ Preventative maintenance
*by S***Y on April 29, 2026*

Decided to use this in my DEF system every time I change the oil (5-7k miles) after needing to replace the DEF tank system at 75k miles. I don’t know if the product works, as this is my first time, but if $20 every 5-7k miles saves me a $1500 bill every 75k miles then it’s worth it.

## Frequently Bought Together

- Rislone 4784 DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz
- Rislone 4780 Diesel DEF Treatment | Prevents AdBlue/DEF Fluid Crystallization, 8 oz
- Rislone® 4744 DPF Clean™ Diesel DPF, Exhaust & Emissions System Cleaner, 16.9 oz, 1-Pack

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-05-30*