---
product_id: 1290602
title: "Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce"
brand: "royal purple"
price: "€ 28.49"
currency: EUR
in_stock: true
reviews_count: 13
category: "Royal Purple"
url: https://www.desertcart.it/products/1290602-royal-purple-max-clean-fuel-system-cleaner-and-stabilizer-11722
store_origin: IT
region: Italy
---

# 2.6% avg horsepower increase 3.2% avg fuel economy boost Up to 18% emission reduction Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce

**Brand:** royal purple
**Price:** € 28.49
**Availability:** ✅ In Stock

## Summary

> ⛽⚡ Clean fuel, fierce performance, greener rides!

## Quick Answers

- **What is this?** Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce by royal purple
- **How much does it cost?** € 28.49 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/1290602-royal-purple-max-clean-fuel-system-cleaner-and-stabilizer-11722)

## Best For

- royal purple enthusiasts

## Why This Product

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

## Key Features

- • **Eco-Friendly Drive:** Reduce harmful emissions by up to 18% and drive cleaner with confidence
- • **Performance Amplifier:** Gain an average 2.6% horsepower increase and feel the difference
- • **Fuel Efficiency Booster:** Unlock an average 3.2% improvement in MPG—save more on every drive
- • **Universal Compatibility:** Works seamlessly with gasoline, diesel, ethanol blends & biofuels
- • **Triple-Action Powerhouse:** Cleans injectors, valves & combustion chambers for peak engine health

## Overview

Royal Purple Max-Clean is a premium 3-in-1 fuel system cleaner and stabilizer designed to restore engine performance by removing deposits from injectors, carburetors, intake valves, and combustion chambers. It improves fuel economy by 3.2%, increases horsepower by 2.6%, and significantly reduces emissions (hydrocarbon, NOx, CO) by up to 18%. Compatible with gasoline and diesel engines, including ethanol blends and biofuels, Max-Clean is EPA and CARB compliant, making it a top choice for professional-grade vehicle maintenance.

## Description

Royal Purple Max-Clean is a state-of-the-art high performance fuel system cleaner that maximizes the performance of your fuel system. Max-Clean restores fuel economy by deeply penetrating deposits and cleaning injectors, carburetors, intake valves and combustion chambers. Royal Purple Max-Clean is EPA / CARB Compliant. Recommended for use in gasoline and diesel engines and can be used with all ethanol blends or biofuel. Max-Clean can be used in both 4-cycle & 2-cycle engines and will not harm vehicle emissions equipment.

Review: Fixed engine shutter - It takes the engine shutter out of my 2018 3.5 echoboost. Seems to work great so far and adds a little bit of mpg also
Review: Great fuel cleaner! - Great fuel injector cleaner. Royal purple is the best product you can use on your vehicle.

## Features

- 3-in-1 fuel additive keeps new engines clean and improves vehicle's performance
- Improves fuel economy an average of 3.2 percent
- Increases horsepower an average of 2.6 percent
- Reduces hydrocarbon, NOx and CO emissions (on average 12, 13 and 18-percent respectively)
- Fit type: Vehicle Specific

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00B1VBQRS |
| Best Sellers Rank | #1,125 in Automotive ( See Top 100 in Automotive ) #10 in Fuel System Cleaners |
| Brand | Royal Purple |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,803) |
| Date First Available | January 16, 2013 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.25 pounds |
| Item model number | 11722 |
| Manufacturer | Royal Purple |
| Manufacturer Part Number | 11722 |
| Model | 11722 |
| OEM Part Number | 11722 |
| Product Dimensions | 2.63 x 2.63 x 9.73 inches |

## Images

![Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce - Image 1](https://m.media-amazon.com/images/I/7178Kyc-yJL.jpg)

## Questions & Answers

**Q: my tank holds 33 gallons, would i have to fill it up only will 20 gallons after i pour in Max Clean or could i fill right up?**
A: Put in a bottle & fill your tank 3/4 of the way up.  That way you get the improved performance, but only have to buy one bottle.  That's what I do as I have a 26 gallon tank.

**Q: How to use this ? Can I just put this to the fuel tank ?**
A: Dump it in the fuel tank and fill it up with gas. This large can will treat up to 20 Gallons. I use it in my motorcycle, so I just put a small amount in. It also has a fuel stabilizer in it which is good cause I don't ride the bike that often.

**Q: Does this work in small gas engines?**
A: What do u mean by small gas engines? Im running a 1500cc engine and works well with it. Is this small enough?

**Q: Does MaxClean come with the application funnel for capless fuel tanks like some of their other products?**
A: It does come with a plastic funnel that attaches to the bottle. Depends what fuel your vehicle takes if it will work or not if it's a caplesss filler neck vehicle tho.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fixed engine shutter
*by J***N on November 14, 2025*

It takes the engine shutter out of my 2018 3.5 echoboost. Seems to work great so far and adds a little bit of mpg also

### ⭐⭐⭐⭐⭐ Great fuel cleaner!
*by M***A on December 8, 2025*

Great fuel injector cleaner. Royal purple is the best product you can use on your vehicle.

### ⭐⭐⭐⭐⭐ Car ran smoother
*by A***R on November 23, 2025*

I seems to work very well. I tried it out and noticed immediate results. The car appeared to accelerate and run at much smoother intervals.

## Frequently Bought Together

- Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce
- Royal Purple 18000 Max Atomizer Fuel Injector Cleaner, 6 fl. oz.
- Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-25*