---
product_id: 692659021
title: "DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz"
brand: "rislone"
price: "$178"
currency: NZD
in_stock: true
reviews_count: 5
category: "Rislone"
url: https://www.desertcart.nz/products/692659021-def-crystal-clean-diesel-def-and-scr-emissions-system-cleaner
store_origin: NZ
region: New Zealand
---

# Exclusive DEF/AdBlue tank application 5,000-mile regular use interval Safe for DOC, DPF, SCR & ASC systems DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz

**Brand:** rislone
**Price:** $178
**Availability:** ✅ In Stock

## Summary

> 🔧 Keep your diesel running clean, lean, and mean—because your rig deserves the best!

## Quick Answers

- **What is this?** DEF Crystal Clean™ Diesel DEF & SCR Emissions System Cleaner, 11.8 oz by rislone
- **How much does it cost?** $178 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/692659021-def-crystal-clean-diesel-def-and-scr-emissions-system-cleaner)

## 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

- • **Plug & Play Clean:** Simply add to your DEF tank’s blue cap—no engine downtime, no complicated installs.
- • **Warranty-Safe Formula:** Keeps your diesel emissions system clean without risking your manufacturer’s warranty.
- • **Crystal Clear Efficiency:** Dissolves white crystallization deposits that throttle your SCR system performance.
- • **Drive Longer, Refuel Less:** Cuts DEF consumption dramatically—stretch your fill-ups and save money.
- • **Universal Diesel Compatibility:** Works seamlessly with all major DEF fluids and diesel tech brands like Cummins, PowerStroke, and BlueTEC.

## Overview

Rislone DEF Crystal Clean™ is a precision-engineered emissions system cleaner designed for diesel vehicles prone to SCR system crystallization. By safely dissolving harmful deposits in the DEF tank and SCR components, it restores engine power, reduces DEF consumption, and prevents limp mode. Compatible with all DEF fluids and major diesel technologies, it’s a warranty-safe, easy-to-use solution for maintaining peak diesel performance every 5,000 miles.

## 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: 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: 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 |
| Brand | Rislone |
| Customer Reviews | 4.5 4.5 out of 5 stars (417) |
| Date First Available | 15 January 2025 |
| Item Weight | 431 g |
| Item model number | 4784 |
| Manufacturer | Bar's Products |
| Manufacturer Part Number | 4784 |
| Model | Diesel DEF & SCR Emissions |
| Package Dimensions | 22.91 x 7.01 x 6.91 cm; 431 g |
| Special Features | Automotive |

## Images

![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

### ⭐⭐⭐⭐⭐ Review
*by T***Y on 25 January 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.

### ⭐⭐⭐⭐⭐ Review
*by M***D on 17 November 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.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 29 March 2025*

As always, I'm skeptical when it comes to product performance—but this one? Amazing. I never owned a diesel until I bought my '21 GMC HD2500 Duramax. I love it, but man, diesel engines demand preventive maintenance. You can't wait for things to break—you’ve got to stay ahead of it with products that help reduce or even prevent issues. This particular product is excellent. Since the day I bought my truck, I’ve had nonstop problems with the DEF tank sensors sticking. Sometimes it would show full when I knew it wasn’t, and other times it claimed to be half empty right after a fresh fill-up. Totally unreliable. And what did the dealer say? “It’s inadvertent.” That word should be banned—it’s just an excuse to ignore a real problem. Let me tell you—this product works. Period. And it worked fast, too. Absolutely amazing.

## 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-08*