Marvel MARV13R Mystery Oil Multi-Purpose Engine & Fuel Treatment - 1 Quart

Marvel Mystery Oil is a legendary multi-purpose engine oil and fuel system additive with roots dating back to 1923. Originally developed to combat carburetor deposits caused by poorly refined gasoline, this trusted formula has been protecting engines in cars, trucks, marine vessels, and powersports equipment for over a century. The MARV13R is the classic 1-quart (32 oz.) bottle, compatible with both conventional and synthetic motor oils, as well as 2- and 4-cycle engines.

Added to Fuel, Marvel Mystery Oil:

• Cleans and lubricates fuel injectors and carburetors for improved throttle response
• Reduces and prevents varnish and gum buildup that clogs injectors and carburetor jets
• Extends spark plug life by creating a cleaner-burning cylinder environment
• Improves fuel economy by reducing internal engine friction
• Compatible with gasoline and diesel fuel — use 4 oz. per every 10 gallons at each fill-up

Added to Engine Oil, Marvel Mystery Oil:

• Prevents valve sticking, clatter, and carbon deposit buildup
• Fortifies and extends the life of conventional and synthetic motor oils
• Prevents oil breakdown caused by extreme high and low temperatures
• Reduces and prevents acid and sludge formation in new and older engines
• Promotes easier cold-weather starting with a pour point of -65°F
• At oil changes, replace up to 20% of engine oil capacity with Marvel — for a 5-quart system, substitute one full quart

Additional Benefits:

• Safe for catalytic converters and oxygen sensors
• Safe to use with synthetic and synthetic-blend motor oils
• Effective in marine inboard and outboard engines
• Note: When used as a diesel fuel additive, this product does not comply with federal low-sulfur content requirements for 2007 and newer diesel motor vehicles

Marvel Mystery Oil is a trusted single-product solution for a wide range of engine maintenance needs, suitable for automotive, marine, RV, and powersports applications.