Fuel Additives FAQs
It forms non-combustible varnish that deposit on surfaces in the fuel system, which decreases engine performance/fuel economy, and increases emissions.
No, it will not give new life to old fuel. But as a fuel system stabilizer, Max-Clean will prevent the fuel from degrading any further.
Fuel can be stabilized up to 1 year for gasoline/ethanol blends up to E15, and up to 9 months for higher ethanol concentrations like E85. Higher ethanol concentrations tend to increase water contamination and oxidation of the fuel.
Gasoline, ethanol, diesel, and biodiesel.
Yes, Max-Clean provides excellent detergency and cleaning and fuel stabilization in diesel-type fuels. However, Max-Clean does not provide the benefits of increased cetane and anti-gel, as commonly found in diesel fuel-specific additive. If you are looking for increased cetane and anti-gel, along with benefits of Max-Clean, we recommend Royal Purple Max-Tane™ Total Diesel Performance Additive. Max-Tane can be used with any type or grade of diesel fuel, including #1 diesel and #2 diesel, biodiesel and biodiesel blends, and ultra-low-sulfur diesel (ULSD).
Yes, it will not harm catalytic converters or oxygen sensors, and it will clean/remove deposits in port-injected, direct-injected, and carbureted engines. Max-Clean is especially beneficial to Direct Gasoline Injected engines as it provides best in class cleaning of the high pressure injectors without effecting fuel viscosity and flow.
Our fuel system cleaner contains a proprietary form of polyetheramine (PEA) that solubilizes deposits so they can be burned during the combustion cycle in an engine. PEA is the industry standard fuel additive detergent in premium fuel system treatments, and the unique PEA used in Max-Clean is most effective.
No, but an engine that has been cleaned of accumulated carbon deposits has a reduced octane requirement. The reduced octane requirement reduces the likelihood of combustion pre-ignition and detonation, and reduced engine performance.
If you’re looking for the fuel stabilization and cleaning benefits along with an increase in octane, we recommend Max-Boost™ Octane Booster & Stabilizer. Max-Boost is formulated for use in leaded and unleaded gasoline, and alternate fuels like gasohol, reformulated gasoline and all ethanol blends.
Pour entire contents of can into a nearly empty tank and refuel. One (1) can treats up to 20 gallons. For tank sizes outside of this range, use one (1) ounce per gallon. In 2-cycle engines, use one (1) ounce per two (2) gallons. Royal Purple recommends using the 6-ounce can every 3,000 miles (4,828 km) and the 20-ounce can every 10,000 miles (16,093 km).
Royal Purple Max-Boost provides an increase of up to 30 points (3 octane numbers) in fuel octane, which meets or exceeds the boost of any other consumer octane boosting product available. In addition, Max-Boost provides the added benefits of stabilizing fuel, cleaning deposits and providing protection for non-hardened exhaust valve seats (lead substitute). It effectively replaces 2 to 4 products, depending on your needs.
Each 16-ounce can of Max-Boost treats up to 25 gallons, with maximum effective dosage at about 1 ounce of Max-Boost per gallon of fuel. To ensure best mixing with fuel, Royal Purple recommends adding Max-Boost to your fuel tank at fill-up, prior to putting the fuel into the tank.
Max-Boost is safe for use in any gasoline and gasoline/ethanol blend of fuel, but many non-performance cars do not benefit from high octane fuel. If the fuel stabilization and cleaning benefits of Max-Boost are what you want, rather than the increase in octane, we recommend Royal Purple Max-Clean Fuel System Cleaner & Stabilizer.
If your vehicle uses any type or grade of diesel fuel, including #1 diesel and #2 diesel, biodiesel or ultra-low-sulfur diesel (ULSD), we recommend Royal Purple Max-Tane Total Diesel Performance.
Yes. Max-Boost works in any gasoline or gasoline/ethanol blend fuel delivery system and will perform in any engine that runs best with high-octane fuel.
Max-Tane is better than any other consumer diesel additive because it combines the benefits of every other consumer diesel fuel treatment in just one product. Max-Tane is a cetane booster, a fuel lubricity enhancer, a fuel stabilizer and demulsifier, a fuel anti-gel and a fuel system and injector cleaner. It also improves fuel economy up to 10%. Royal Purple Max-Boost effectively replaces up to 4 other diesel fuel additive products.
At a minimum, you should use one (1) ounce of Max-Tane fuel injector cleaner and cetane booster for every five (5) gallons of fuel. For high performance vehicles, this dosage can be increased to one (1) ounce to every two (2) gallons.