Royal Purple® Max-Boost™ is a high-performance octane booster and fuel treatment that increases gasoline octane, reduces emissions, and enhances engine performance while stabilizing fuel. Max-Boost is formulated with MMT, which delivers the best octane enhancement to help eliminate engine damaging detonation, pre-ignition, and pinging or knocking from low octane gasoline.

Max-Boost is formulated for engines equipped with carburetors, port fuel injection and direct injection, as well as turbocharged, supercharged and nitrous-injected engines. Safe for use in leaded and unleaded gasolines, and alternate fuels like gasohol, reformulated gasoline, and all ethanol blends. Max-Boost is safe for oxygen sensors and catalytic converters.



  • Maximizes power, responsiveness and fuel economy
  • Raises octane rating up to 30 points or 3 numbers
  • Cleans deposits from fuel injectors
  • Stabilizes fuel
  • Reduces engine knocking and pinging
  • Restores lost power due to knock-retard in computer controlled engines
  • Replaces lead additives for protection of non-hardened valve seats


One can treats up to 25 gallons of gasoline. Do not exceed 2 ounces of Max-Boost per gallon of fuel. Pour entire can into tank before fill-up. Clean immediately if spills occur, as product can permanently stain painted surfaces. Do not expose liquid to direct or indirect sunlight. Replace cap after can has been emptied, and dispose of properly.


Max-Boost is a racing formula and is not street legal. Please consult Royal Purple’s automotive technical support department at 281-354-8600 or 888-382-6300 for more information.

Available Sizes

Available SizesPart NumberItem Number
6 x 16-Oz. Case06757301697175039
16-Oz. Bottle11757



PDS Max-Boost SDS Max-Boost
Scroll to Top