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30% Off Online Orders of Select Parts and Accessories. Enter Promo Code PEP30 in Cart

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30% Off Online Orders of Select Parts and Accessories
Receive 30% Off Your Online Purchase. Use promotional code PEP30 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 10/27/16. Online orders scheduled for in-store pick up must be completed by closing on 10/26/16 for discount to apply.

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  • Part #: 11722|
  • SKU: 772758

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    • Maximizes horsepower
    • Improves fuel economy
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

Royal Purple Max Clean Total Fuel System Cleaner 20oz

Royal Purple’s Max-Clean is a high performance synthetic cleaner that maximizes the performance of your fuel system. Formulated with state-of-the-art detergents to deeply penetrate and clean injectors, carburetors, intake valves and combustion chambers. Royal Purple’s Max-Clean is EPA approved. Safe for use in gasoline and diesel engines and can be used with all ethanol blends. Max-Clean will not harm catalytic converters and oxygen sensors.
  • Maximizes horsepower
  • Improves fuel economy
  • Prevents deposit buildup
  • Stabilizes fuel


Rated 4.8 out of 5 by 6 reviewers.
Rated 5 out of 5 by great results Royal purple is the only product that I will ever use. September 11, 2016
Rated 5 out of 5 by Worth the extra money!!!! I tried all of them...Purple is by far the best! Noticeable difference right away!!! A few more dollars than the other stuff but alot cheaper than the Dealer or service station would charge for "Professional Injector cleaning". November 11, 2015
Rated 4 out of 5 by Royal Purple Max Clean Used it in a 2006 Mercury Mountaineer that seemed to be having hesitation issues after start up. No more hesitation issues for now but since before and after cant be visualized without a tear down, who knows. September 13, 2015
Rated 5 out of 5 by Royal Purple Fuel System Cleaner I buy any and all Royal Purple products for my 1995 Toyota Supra. August 22, 2015
Rated 5 out of 5 by Very good product Toyota 1987, Pick up 4x4, 400,000 miles and original fuel injectors. At 300,000 a slight miss that could not be corrected with a tune up valve adjustment, O2 Sensor replacement. The miss was removed with 1 can this cleaner. I use it every 10,000 miles and the truck is running fine July 28, 2015
Rated 5 out of 5 by Hands down the best The stuff works great I notice a huge difference every time I use it. it is a bit pricey but if you have smaller gas tank you going to get 2 servings July 14, 2015
  • 2016-10-23 T08:23:58.936-05:00
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