Marvel Mystery Oil

Keep your engine running cleaner, smoother, and longer with Marvel Mystery Oil, the original oil enhancer and fuel system treatment trusted by mechanics and drivers for decades. This versatile formula is designed to clean, lubricate, and protect critical engine components, helping your vehicle maintain optimal performance and efficiency.

Marvel Mystery Oil works inside both the fuel system and oil system to remove harmful deposits, reduce friction, and ensure smoother engine operation. By cleaning fuel injectors, carburetors, and upper cylinders, it supports easier starts, smoother idling, improved compression, and better fuel economy (MPG).

This powerful treatment also helps prevent varnish, gum, sludge, rust, and corrosion, protecting engine components from premature wear. Safe for use in all gasoline types, diesel, ethanol blends, and compatible with conventional, synthetic, 2-cycle, and 4-cycle oils, Marvel Mystery Oil is a versatile solution for virtually any vehicle or small engine.

• Cleans and lubricates fuel injectors, carburetors, and upper cylinders

• Supports smoother starting and more consistent idling

• Helps restore compression and improve overall power output

• Adds a protective lubrication film to reduce metal-on-metal wear

• Helps extend the life of high-friction, high-heat engine components

• Dissolves varnish, gum, and sludge that slow engine response

• Helps prevent rust and corrosion within the fuel and oil systems

• Promotes cleaner fuel delivery and combustion

• Can help improve miles per gallon (MPG) with regular use

• Works with all gas types, including diesel and ethanol blends

• Mixes safely with conventional, synthetic, 2-cycle, and 4-cycle oils

• Ideal for cars, trucks, motorcycles, boats, lawn equipment, and more

• Easy to measure and pour

• Perfect size for routine vehicle maintenance