
Royal Purple's Max-Clean Fuel System Cleaner is a high-performance fuel system treatment that claims to clean injectors, restore fuel economy, and reduce engine buildup. It is recommended for use in gasoline, diesel, and biofuel engines and can be used in both 4-cycle and 2-cycle engines. The product is designed to deeply penetrate and clean injectors, carburetors, intake valves, and combustion chambers. While some customers have reported improved fuel efficiency and smoother engine performance, others have expressed skepticism about the effectiveness of fuel additives in general. The Royal Purple Max-Atomizer Fuel Injector Cleaner is another product that specifically targets injector deposits, which can cause performance loss and reduced fuel economy. It has received positive reviews from customers who have noticed improvements in engine performance and acceleration after using the product.
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What You'll Learn
- Royal Purple's Max-Clean Fuel System Cleaner improves fuel efficiency and restores power
- Max-Clean can be used in both 4-cycle and 2-cycle engines and will not harm vehicle emissions equipment
- Max-Clean should be used every 10,000 miles or annually, whichever comes first
- Max-Atomizer improves injector flow rates, especially in BMW GDI turbo engines
- Max-Clean also stabilizes fuel during low-use and storage periods, preventing fuel varnishing

Royal Purple's Max-Clean Fuel System Cleaner improves fuel efficiency and restores power
Royal Purple's Max-Clean Fuel System Cleaner is a state-of-the-art synthetic fuel system treatment that improves fuel efficiency and restores power. It is designed to deeply penetrate and clean injectors, carburetors, intake valves, and combustion chambers, resulting in improved engine performance and fuel economy.
The build-up of deposits in fuel injectors can lead to reduced fuel atomization, causing a loss of power and fuel efficiency. Max-Clean's unique formula helps to remove these deposits, ensuring optimal injector performance. This, in turn, can lead to improved fuel efficiency and enhanced engine power.
In addition to cleaning fuel injectors, Max-Clean also helps to stabilize fuel during periods of low use and storage. This prevents the fuel from varnishing, ensuring that your engine always has fresh, stable fuel to operate efficiently.
The recommended usage of Max-Clean is to pour the entire contents of the 20 oz. can into a nearly empty tank and then refuel. One can treat up to 20 gallons of fuel. For larger or smaller tanks, it is recommended to use one ounce of Max-Clean per gallon of fuel. Max-Clean should be used every 10,000 miles or annually, whichever comes first.
Users of Max-Clean have reported noticeable improvements in their vehicles' performance and fuel efficiency. Some have noted smoother engine operation, improved acceleration, and increased fuel mileage after using Max-Clean. However, it is important to note that results may vary depending on various factors such as engine type, driving conditions, and fuel quality.
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Max-Clean can be used in both 4-cycle and 2-cycle engines and will not harm vehicle emissions equipment
Royal Purple's Max-Clean is a state-of-the-art synthetic fuel system cleaner and fuel injector cleaner. It is designed to deeply penetrate and clean injectors, carburetors, intake valves, and combustion chambers to restore fuel economy and reduce emissions. The product is recommended for use in gasoline and diesel engines and can be used with all ethanol blends or biofuel.
Max-Clean is suitable for both 4-cycle and 2-cycle engines and will not harm vehicle emissions equipment. It is EPA/CARB compliant, ensuring that it meets environmental standards and will not cause damage to your vehicle's emissions system. This makes it a safe and effective choice for improving engine performance and fuel efficiency.
The use of Max-Clean can result in improved fuel efficiency, smoother engine performance, and long-term fuel system protection. It helps prevent fuel system corrosion and keeps the fuel fresh, contributing to better overall engine health. Max-Clean also stabilizes fuel during low-use and storage periods, preventing the varnishing of fuel. This feature is especially beneficial for vehicles that are not used frequently or are stored for extended periods.
Max-Clean is easy to use and can be added directly to your fuel tank. It is recommended to pour the entire contents of the bottle into a nearly empty tank and then refuel. One can of Max-Clean treats up to 20 gallons of fuel. For larger tank sizes or 2-cycle engines, it is suggested to use one ounce of Max-Clean per gallon of fuel.
Overall, Max-Clean is a reliable and effective solution for improving engine performance, restoring fuel economy, and maintaining the health of your fuel system. Its compatibility with both 4-cycle and 2-cycle engines, along with its non-harmful nature towards vehicle emissions equipment, makes it a versatile and safe choice for vehicle maintenance.
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Max-Clean should be used every 10,000 miles or annually, whichever comes first
Royal Purple's Max-Clean Fuel System Cleaner is a state-of-the-art synthetic fuel system treatment that restores fuel economy and reduces engine buildup and tailpipe emissions. It is recommended for use in gasoline, diesel, and biofuel engines and can be used in both 4-cycle and 2-cycle engines. Max-Clean is designed to deeply penetrate and clean injectors, carburetors, intake valves, and combustion chambers, removing deposits and restoring optimal performance.
The manufacturer recommends using Max-Clean every 10,000 miles or annually, whichever comes first. This regular use can help prevent issues caused by fuel injector deposits and intake valve deposits (IVD). IVDs occur when oil seeps past the intake valve guide seals and burns on the hot valve, forming carbon deposits. These deposits can restrict airflow to the cylinders, resulting in reduced power and fuel economy. By using Max-Clean regularly, you can prevent the formation of these deposits and maintain the performance and efficiency of your engine.
In addition to its cleaning properties, Max-Clean also stabilizes fuel during low-use and storage periods, preventing the fuel from varnishing. This feature ensures that your fuel remains stable and fresh, even if your vehicle is not in regular use.
Max-Clean is easy to use; simply pour the entire contents of the 20 oz. can into a nearly empty tank and then refuel. One can treat up to 20 gallons of fuel. For larger or smaller tanks, adjust the amount accordingly, using one ounce of Max-Clean per gallon of fuel.
Users have reported positive experiences with Max-Clean, noting improvements in fuel efficiency, smoother engine performance, and enhanced responsiveness. Some have also observed increased horsepower and reduced emissions after using Max-Clean. While it may not turn your vehicle into a "road rocket," as one user put it, it can certainly help maintain and optimize your engine's performance, making it a valuable tool for vehicle maintenance.
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Max-Atomizer improves injector flow rates, especially in BMW GDI turbo engines
Injector deposits are a common issue in modern Gasoline Direct Injection (GDI) engines, as the injectors are located in the combustion chambers, where the extreme heat bakes deposits onto the injector nozzles. This results in reduced injector flow rates and causes performance loss and reduced fuel economy.
Royal Purple's Max-Atomizer is a synthetic fuel injector cleaner that has been specifically designed to tackle this issue. It contains highly concentrated polyether amine (PEA) detergents that can effectively clean clogged and coked injectors, restoring injector flow and optimising injector spray patterns.
The product has been tested in BMW GDI turbo engines, and the results indicate that Max-Atomizer improves injector flow rates in these engines. The high flash point of Max-Atomizer allows it to reside in hot combustion chambers longer than other products, resulting in more effective deposit clean-up. This is particularly important in turbocharged engines, where the extreme heat can cause low-flash-point detergents in other additives to vaporize before reaching the injectors.
In addition to improving injector flow rates, Max-Atomizer also provides other benefits, including improved fuel economy, enhanced power and performance, reduced emissions, smoother idling, and quicker and easier starts. It is also the only fuel injector cleaner that stabilizes ethanol, preventing its chemical breakdown, which can cause harmful effects to an engine.
Overall, Max-Atomizer is a highly effective product for improving injector flow rates, especially in BMW GDI turbo engines, and it offers a range of additional benefits that can enhance the performance and longevity of an engine.
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Max-Clean also stabilizes fuel during low-use and storage periods, preventing fuel varnishing
Royal Purple's Max-Clean is a state-of-the-art synthetic fuel system cleaner and fuel injector cleaner. It is designed to deeply penetrate and clean injectors, carburetors, intake valves, and combustion chambers to restore fuel economy and reduce emissions. The product is recommended for use in gasoline and diesel engines and can be used with all ethanol blends or biofuel. It is also compatible with both 4-cycle and 2-cycle engines and will not harm vehicle emissions equipment.
Max-Clean is an effective solution for preventing fuel varnishing during low-use and storage periods. To use Max-Clean for this purpose, pour the entire contents of the bottle into a nearly empty tank immediately before refuelling, and then install fuel on top of the additive. One 20-ounce can of Max-Clean treats up to 20 gallons of fuel. For larger or smaller tanks, adjust the dosage to one ounce of Max-Clean per gallon of fuel. For 2-cycle engines, the dosage is also one ounce per gallon.
By stabilizing the fuel, Max-Clean helps prevent the formation of gums and deposits that can build up in the fuel system. This, in turn, reduces the need for frequent clean-up of fuel injectors and other engine components. Max-Clean should be used regularly, either every 10,000 miles or annually, to maintain optimal fuel system performance and prevent issues related to fuel varnishing.
In addition to stabilizing fuel, Max-Clean has several other benefits for fuel injectors and the overall fuel system. It helps improve fuel economy, smoothen engine idle, and enhance engine response. It also removes deposits from injectors and restores optimal injector flow rates, which can improve engine performance and fuel efficiency.
Overall, Max-Clean is a versatile and effective fuel system treatment that not only stabilizes fuel during low-use and storage periods to prevent varnishing but also offers a range of performance-enhancing benefits for fuel injectors and the overall fuel system.
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Frequently asked questions
Yes, Royal Purple's Max-Clean Fuel Injector Cleaner is a high-performance fuel system cleaner that restores fuel economy by cleaning injectors, carburetors, intake valves, and combustion chambers.
The Max-Clean Fuel Injector Cleaner penetrates and removes deposits that accumulate in the injectors, valves, and combustion chambers. This buildup can restrict airflow into cylinders, causing a loss of power and fuel economy.
The product claims to improve fuel economy, smooth idling, and quicker response. It also helps prevent fuel system corrosion and keeps the fuel fresh, optimizing engine health and performance.
It is recommended to use the Max-Clean Fuel Injector Cleaner every 10,000 miles or annually, whichever comes first.











































