Marvel Mystery Oil Marvel Mystery Oils

• When added to gasoline: Cleans and lubricates fuel injectors and carburetors
• Improves gas mileage
• Reduces and prevents varnish and gum build-up
• Extends spark plug life
• Safe for catalytic converters and oxygen sensors
• When added to engine oil: Prevents valve sticking and clatter
• Fortifies properties of engine oil, prevents breakdown caused by extreme temperatures
• Promotes easier cold weather starts
• Reduces and prevents sludge and acid formation
• For all marine engines- inboard and outboard