Marvel Mystery Oil (MM13R-MM14R)


About Marvel Mystery Oil

Born in Chicago in 1923, Marvel Mystery Oil was developed to combat deposits on carburetors caused by poorly refined gasoline of the age. Marvels popularity soared as word spread of its effectiveness in treating all types of engine ailments and was used extensively in WWII on everything from airplanes to battleships to tanks. Today, Marvel Mystery Oil provides vehicle owners the ability to solve scores of automotive ailments with one product that can be added to both oil and fuel.


  • Cleans and lubricates fuel injectors and carburetors.
  • Reduces and prevents varnish and gum build-up.
  • Prevents valve sticking and clatter.
  • Prevents oil breakdown caused by extreme temperatures.
  • Provides top end lubrication essential for restoring power and fuel economy.
  • Advanced engine technology stabilizes fuel for months and helps promote easy start-ups.
  • Prevents rust and corrosion from Ethanol containing fuels.
  • Reduces cold weather starts and creates smoother starts.


Mix Marvel Mystery Oil with engine oil. Mix ratio as specified.  


MM13R 32 oz.


MM14R 1 Gallon.