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FREE 30-day refund/replacement
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Availability:
Only 6 left in stock, order soon!
Arrives
Monday, Mar 9
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Item Package Quantity: 1
Features
- Restores fuel economy
- Stabilizes ethanol
- Maximizes horsepower
- Improves responsiveness
- For use in both gasoline and diesel engines
Description
Royal Purple’s Max-Atomizer is a fully-synthetic, highly concentrated, high performance fuel injector cleaner. It is specially formulated to solve problems with today’s direct injection engines, but can be used with any type of fuel injection. Max-Atomizer contains highly concentrated polyether amine (PEA) detergents that quickly clean clogged and coked injectors, restoring 100% of injector flow. This optimizes injector spray patterns and better atomizes fuel as it enters the combustion chamber. The result is improved fuel economy, enhanced power and performance, reduced emissions, smoother idle, and quicker / easier starts. Max-Atomizer is the only fuel injector cleaner that also stabilizes ethanol, which chemically breaks down to cause harmful effects to an engine.
Brand: Royal Purple
Item Form: Spray
Scent: Unscented
Specific Uses For Product: Fuel Injector
Material Feature: Unscented
Manufacturer: Royal Purple
Brand: Royal Purple
Model: 18000
Item Weight: 6 ounces
Product Dimensions: 2 x 2 x 7 inches
Item model number: 18000
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 18000
OEM Part Number: 18000
Special Features: Concentrated
Lift Type: Power
Date First Available: May 8, 2015
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Mar 9
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great product cleaned like it said and got a little better gas mileage.
Reviewed in the United States on January 22, 2026 by Antonio
I recently purchased the Fuel Injection Cleaner from Amazon, and I am thrilled with the results it has delivered. As a car enthusiast who is constantly striving for optimal engine performance, I have tried various fuel system cleaners in the past, but this one takes the cake. First and foremost, the convenience of this product cannot be overstated. The packaging includes a user-friendly pour spout, making it incredibly easy to add the cleaner to your fuel tank without any mess or spills. I appreciated the clear instructions provided, ensuring a hassle-free application process. This fuel injection cleaner quickly proved its worth by targeting and effectively removing harmful deposits and carbon buildup within the fuel system. I noticed a significant improvement in engine performance, particularly in terms of smoother idling, reduced hesitation, and improved fuel efficiency. It's as if this cleaner revitalized my engine, breathing new life into it. The cleaner's powerful yet gentle formula is safe for use in all fuel-injected engines, including those with sensitive components. I had no concerns about damaging my engine or fuel system while using this product. Additionally, it is compatible with gasoline, ethanol-blended fuels, and even hybrid vehicles. The versatility of this cleaner is a major plus, as I can confidently use it in my entire fleet of vehicles. One of the standout features of this fuel injection cleaner is its ability to address various fuel-related issues. Whether you're dealing with clogged injectors, poor fuel atomization, or inefficient fuel combustion, this product tackles them all. By restoring optimal fuel flow and combustion, it helps maximize power output and improve overall engine performance. I also appreciated the long-lasting benefits of this cleaner. After just one treatment, I've noticed a sustained improvement in my vehicle's performance. This product provides ongoing protection against future deposits, ensuring that my fuel system remains clean and efficient between treatments. Lastly, the value for money that this fuel injection cleaner offers is unparalleled. The affordable price point, coupled with the noticeable results it delivers, makes it an absolute steal. Compared to expensive professional cleaning services or potential repairs caused by neglected fuel system issues, this cleaner is a wise investment that saves both time and money. In conclusion, if you're searching for an effective, versatile, and value-packed fuel injection cleaner, look no further. This Amazon purchase has undoubtedly exceeded my expectations by providing noticeable improvements in engine performance, fuel efficiency, and overall drivability. Give your vehicle the TLC it deserves and experience the benefits of a clean and optimized fuel system with this exceptional product. Don't hesitate! Add the Fuel Injection Cleaner to your cart today and enjoy the results.
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Reviewed in the United States on December 19, 2023 by Dez F.
I've tried most of the commonly available products like this on the American market. The majority are snake oil and do nothing to improve gas mileage or clean the fuel system. Prior to Royal Purple, I tried Amsoil PI which is more expensive but did work exceptionally well. I later learned from a master mechanic that unless these types of products have an additive package containing PEA, they likely won't do much which explains the lackluster results from the other products, and also why the Amsoil PI did work so well. In comes Royal Purple to my door and I have to say it does work at LEAST as well as the Amsoil, at a slightly lower price and easier to find. Royal Purple does contain the additive package and you can really tell the difference after running it a full tank. My 2016 NIssan Maxima now has more pep from a dead stop, is getting a few MPG better mileage and to my surprise it quieted a bit of engine noise. I can really feel the performance boost. This will be a go-to product for me after each oil change.
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Reviewed in the United States on January 6, 2026 by Lucas Eldritch
It was easy to use, and didn't cause any harm. I noticed a little bit of a performance increase, but nothing major since my engine is already pretty clean & only has 64,xxx miles on it. I recommend Lucas Fuel Injector cleaner and Upper Cylinder Lube. The bigger bottle with the fuel stabilizer in it. I've noticed a major increase over 5 tanks of fuel using it at the recommended usage amounts. Engine is smoother revving and mpg's went up by 2-4. Best thing for fuel economy is fresh oil & a fresh oil & fuel filter. And making sure your Evaporative Emissions System is working properly. This product does work, but it doesn't work as well as Lucas. Get new spark plugs as well, if the old ones are fouled or are just super old/have more than 20,000-50,000 miles on them depending on type. (Copper vs Platinum vs Iridium) follow the manufacturer specified replacement guidelines for your plugs, fuel filter, oil & oil filter, & make sure your Air Filter is clean. Plus cleaning or replacing your Mass Airflow Sensor, and cleaning your Throttle Body is important. These are all super easy things to do. Sometimes replacing the Spark Plugs is tricky, like on my car they're hidden under my air intake and several highly important things need to be removed to change the back 3. But that's my car. Yours might be easy. If you're not 100% confident in doing the repair yourself, even after learning how, then pay a qualified reputable mechanic to do it for you. Engines are touchy sometimes, and killing a car can be all too easy. Or getting electrocuted by not doing something simple like disconnecting the battery before doing electrical work. Just pay someone if you're hesitant to do it yourself. Take care, & good luck!
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Reviewed in the United States on April 23, 2019 by Firing on all cylinders
great cleaner
Reviewed in the United States on February 15, 2026 by mer beth weller
This stuff actually works like a dream, I wasn't having any real issues ( I Thought ) but after 45,000 miles, I felt it might do something for cleaning the fuel system, after using it exactly like it said to do, my suv is so smooth you won't even know it's running at idle, and it's much faster taking off, not sure on mileage because of the severe cold weather here in Michigan but i'm so pleased i will be buying if for family members, don't be afraid this stuff works.
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Reviewed in the United States on January 18, 2026 by Seeking Truth/Quality.
A good additive for motor
Reviewed in the United States on February 22, 2026 by Jesse J. Medina