August 17, 2018
August 17, 2018


Royal Purple® Max-Blast™ is a high-performance engine intake system cleaner that removes harmful intake valve deposits to restore engine performance and fuel economy. Max-Blast can be used with any type of fuel injection in both gasoline and diesel engines and is ideal for direct injection.


  • Remove deposits from intake valves
  • Concentrated PEA detergents
  • Provides immediate clean-up
  • Ideal for direct injection
  • For gas or diesel injected engines


  • With hot engine running at full operating temperature, spray directly into the throttle body. Can may be sprayed at any angle if it is difficult to reach.
  • If throttle body is unreachable, disassemble air intake system so you can reach and spray into intake system downstream of the MAF sensor.
  • CAUTION: Do not burn yourself on hot engine components.
  • CAUTION: Max-Blast is flammable. Avoid open flames and sparks.
  • Lift the straw and spray PAST the MAF sensor to avoid a code.
  • CAUTION: Spraying into the MAF sensor will cause an engine code.
  • With engine running at about 2,000 RPM, spray in short bursts of approximately 1 – 2 seconds each, until the can is empty.
  • You may need a helper to keep the engine RPM high enough to avoid stalling. Engines with heavy deposits may need to be revved higher than 2,000 RPM.
  • CAUTION: To avoid engine damage, do NOT rev past 3,500 RPM.
  • When can is empty, rev the engine a few times to 3,000 RPM.
  • Continue to run engine at idle for one minute, then shut it off.
  • Reassemble air intake system and let engine heat-soak for one hour.
  • Start engine and drive at highway speeds for 10 – 15 minutes.
  • For best results and total engine clean-up, add a can of Max-Clean® to the tank immediately following cleanup with Max-Blast.


Repeat every 12,000 miles / 12 months, or at every oil change

Available Sizes

Available SizesPart NumberItem Number
6 x 12-Oz. Bottle11853500331175259
12-Oz. Bottle11853