---
product_id: 519729041
title: "4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner, 16.9 oz, 3-Pack"
brand: "rislone"
price: "KD 37.78"
currency: KWD
in_stock: true
reviews_count: 11
category: "Rislone"
url: https://www.desertcart.com.kw/products/519729041-4720-cat-complete-fuel-exhaust-and-emissions-system-cleaner-16
store_origin: KW
region: Kuwait
---

# Boosts fuel efficiency + mileage Safe for all fuel-injected & hybrid engines Cleans fuel, exhaust & emissions systems 4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner, 16.9 oz, 3-Pack

**Brand:** rislone
**Price:** KD 37.78
**Availability:** ✅ In Stock

## Summary

> ⛽ Clean. Tune. Save. Drive smarter, not harder.

## Quick Answers

- **What is this?** 4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner, 16.9 oz, 3-Pack by rislone
- **How much does it cost?** KD 37.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/519729041-4720-cat-complete-fuel-exhaust-and-emissions-system-cleaner-16)

## 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

- • **Smog-Check Savior:** Effectively clears stubborn CEL codes like P0420, helping you pass emissions tests hassle-free.
- • **Maximize Every Mile:** Enhances power, performance & gas mileage for a smoother, more efficient drive.
- • **Triple-System Detox:** Deep-cleans fuel injectors, catalytic converters & exhaust to prevent costly repairs.
- • **Warranty-Friendly Formula:** EPA-compliant and safe for oxygen sensors & catalytic converters—no warranty risk.
- • **Universal Engine Compatibility:** Works seamlessly with gasoline, ethanol, hybrid, turbo, GTDI, Ecotec & EcoBoost engines.

## Overview

Rislone 4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner is a powerful 3-pack solution designed to restore engine efficiency by removing carbon buildup and contaminants from fuel injectors, catalytic converters, oxygen sensors, and exhaust systems. Compatible with a wide range of engines including hybrids and turbocharged models, it improves fuel economy, reduces emissions, and helps prevent costly repairs—all while being safe for your vehicle’s warranty and emissions equipment.

## Description

Fuel, Exhaust & Emissions, Systems Cleaner: CAT COMPLETE Fuel, Exhaust & Emissions System Cleaner has high-performing detergents and heavy duty cleaning solvents that effectively scrub and remove contaminants, soot, carbon build-up, and oily residue from the fuel injectors, combustion chambers, turbo, EGR, catalytic converters, oxygen sensors and the exhaust system. These along with other active chemical agents, react with the gases created in the combustion process to remove the remaining inorganic deposits. This process restores their function and with regular use maintains efficiency. As fuel is burned contaminating byproducts are created that get circulated throughout various vehicle components. The system is designed to be able to handle this process during most normal engine operation. However, the use of poor quality fuel, short driving distance, cold weather, improper maintenance, and component failure can greatly increase the amount of contamination and deposits created inside these systems. Such factors can cause increased exhaust emissions, reduced fuel economy, lost power & performance, drivability issues, engine overheating, hard starts, check engine light illumination and premature engine wear.

Review: P0420 CEL Clear - Kept resetting P0420 CEL on my 2007 Toyota Corolla, hoping I could quickly go through drive cycle and pass my smog check before it came back on. Same code kept coming back on within 2-3 miles of a reset so using Rislone was my last hope before I tried the non fouler trick. Below is exactly what I did, hope it helps someone! 1) Filled my gas tank with premium gas, drove it down to half tank over a few days of driving before I inserted Rislone. 2) Drove ~30 miles and then refueled to full tank with premium gas again(Half highway/half city as instructions state) 3) Instructions say after completing step 2, drive the car to 1/4 gas tank at which point CEL should clear. For me, I drove ~25-30 miles over 3 days, clearing the CEL each time it came back on. During the 3rd day (~60 miles since using Rislone), the CEL didn’t come back on and all monitors reset! Immediately went to smog station and passed. CEL is still off, not sure it will last but who cares! Car is running fine and I don’t need to pay for a new converter just to pass a smog test! Tips: 1) Not sure if premium gas made a difference but I read several people say they used non ethanol/premium gas which cleared P0420 so figured it couldn’t hurt. 2) I bought a cheap OB2 monitor which I kept on when driving so I could see exactly when CEL was coming back on and when monitors are smog ready. If you’re lucky, resetting CEL and going thru drive cycle may be enough to get past smog without using Rislone. In my case, the P0420 CEL would come on within 2-3 miles each time I reset the CEL so using Rislone was a must. 3) Each car is different but generally speaking, once you reset CEL the drive cycle consists of warming up the car for a few minutes and driving 50-60 mph a few times, ideally letting the car come to a stop with no or minimal use of the brake. Make sure A/C is off. Using the OB2 monitor while driving the car will help you get a feel for your cars drive cycle. 4) If a CEL code is pending, the relative monitor to your code will not clear! In California, all monitors except EVAP have to be ready to pass smog, your state may be different.
Review: Has done what it's promised for me - Has worked for me in multiple vehicles with O2 sensor issues. Make sure you only have 3/4 tank and drive at highway speed and beyond for 15 miles. I've watched the check engine light go off while driving or shortly after restarting

## Features

- Increase power, performance, mileage and save gas: Cleans by not only the entire emissions and exhaust system, but the fuel system as well. Works with gasoline, ethanol and hybrid vehicles.
- Save on expensive fuel system and emission control repairs: Regular use every 5,000 miles tunes-up the fuel, emissions and exhaust systems keeping them clean and preventing the CEL light from returning.
- Will not void manufacturer’s new vehicle warranty: Specifically designed and safe to use on vehicles which have oxygen sensors and catalytic converters. Exceeds EPA compliance performance criteria.
- Works on all fuel injected, direct injected, carbureted, turbo, GTDI, Ecotec and EcoBoost engines.
- Clean fuel and exhaust systems reduce excess exhaust hydrocarbon, CO and NOX emissions and saves gas.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BQL2Q284 |
| Best Sellers Rank | #5,952 in Automotive ( See Top 100 in Automotive ) #26 in Fuel System Cleaners |
| Brand | Rislone |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,158) |
| Date First Available | December 19, 2022 |
| Item Weight | 3.76 pounds |
| Item model number | 4720-3PK |
| Manufacturer | Rislone |
| Manufacturer Part Number | 4720-3PK |
| Model | Rislone Cat Complete Fuel, Exhaust and Emissions System Cleaner, Pack of 3 |
| Package Dimensions | 10.51 x 8.94 x 3.15 inches |

## Images

![4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner, 16.9 oz, 3-Pack - Image 1](https://m.media-amazon.com/images/I/913adPvPHYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ P0420 CEL Clear
*by M***V on October 29, 2023*

Kept resetting P0420 CEL on my 2007 Toyota Corolla, hoping I could quickly go through drive cycle and pass my smog check before it came back on. Same code kept coming back on within 2-3 miles of a reset so using Rislone was my last hope before I tried the non fouler trick. Below is exactly what I did, hope it helps someone! 1) Filled my gas tank with premium gas, drove it down to half tank over a few days of driving before I inserted Rislone. 2) Drove ~30 miles and then refueled to full tank with premium gas again(Half highway/half city as instructions state) 3) Instructions say after completing step 2, drive the car to 1/4 gas tank at which point CEL should clear. For me, I drove ~25-30 miles over 3 days, clearing the CEL each time it came back on. During the 3rd day (~60 miles since using Rislone), the CEL didn’t come back on and all monitors reset! Immediately went to smog station and passed. CEL is still off, not sure it will last but who cares! Car is running fine and I don’t need to pay for a new converter just to pass a smog test! Tips: 1) Not sure if premium gas made a difference but I read several people say they used non ethanol/premium gas which cleared P0420 so figured it couldn’t hurt. 2) I bought a cheap OB2 monitor which I kept on when driving so I could see exactly when CEL was coming back on and when monitors are smog ready. If you’re lucky, resetting CEL and going thru drive cycle may be enough to get past smog without using Rislone. In my case, the P0420 CEL would come on within 2-3 miles each time I reset the CEL so using Rislone was a must. 3) Each car is different but generally speaking, once you reset CEL the drive cycle consists of warming up the car for a few minutes and driving 50-60 mph a few times, ideally letting the car come to a stop with no or minimal use of the brake. Make sure A/C is off. Using the OB2 monitor while driving the car will help you get a feel for your cars drive cycle. 4) If a CEL code is pending, the relative monitor to your code will not clear! In California, all monitors except EVAP have to be ready to pass smog, your state may be different.

### ⭐⭐⭐⭐⭐ Has done what it's promised for me
*by T***. on October 17, 2025*

Has worked for me in multiple vehicles with O2 sensor issues. Make sure you only have 3/4 tank and drive at highway speed and beyond for 15 miles. I've watched the check engine light go off while driving or shortly after restarting

### ⭐⭐⭐⭐⭐ Amazingly worked for me!
*by A***M on December 8, 2023*

2011 gmc acadia and have been fighting a P0420 Low efficiency bank 1 code for about a year or so. I've tried cataclean with inconclusive results only because I've done other things at the same time and code has cleared. Oddly enough changing the oil usually cleared the code but eventually came back. I've taken intake apart and, anyone who's owned an acadia, knows the poor fuel system design in the fact that oil gets into the intake and pools up. Along with changing PCV valves and modifying them, I've got the code to go away multiple times but this time, was not going away. I did the oil, cleaned intake, changed air filter etc., etc. Stumbled on to Rislone and it has some pretty positive reviews. I'm a believer in fuel additives and fuel system cleaners but I'm a little skeptical on stuff like this. As stated, I've used Cataclean before and other Cat cleaners with no luck. So, outta desperation, I got myself a bottle and followed directions....Dumped full bottle in when tank was 1/2 full. Drove to my destination about 25 minutes away, mostly highway/high speed roads. It was a 16 mile drive, check engine light was still on when I shut the car off. Did what I had to do, started car 10 minutes later and low and behold light was off!! I couldn't believe it. Drove another 10 miles or so, filled up per the directions and drove home. If I think about I'll update this post down the road but I'm impressed!! UPDATE - CEL came on again after 8 days. Do it works but then doesn't??? I dunno.

## Frequently Bought Together

- Rislone 4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner, 16.9 oz, 3-Pack
- CRC Guaranteed to Pass Emissions Test Formula, 12 Fluid Ounce
- Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz (Pack of 2)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-02-04*