Purpose and Specifications

LIQUI MOLY Marine Super Diesel Additive (25007) is a powerful 1-liter formula designed to clean and protect your diesel fuel system in marine engines. It prevents corrosion, boosts lubrication to cut wear on fuel pumps and injectors, and raises the cetane value for smoother starts, better performance, and fewer emissions. One bottle treats up to 500 liters of diesel fuel at a 1:500 ratio, making it perfect for boats, yachts, and all diesel engines including turbocharged ones with catalytic converters or DPF filters.

• Cleans injectors and fuel lines to stop gumming and deposits
• Protects against water contamination common in marine fuel
• Compatible with biodiesel and HVO fuels
• Shelf life: 4 years when stored cool and dry

When to Use / Replace?

Add directly to your fuel tank with every refueling for ongoing protection, or every 2,000 km (1,200 miles) for best results in regular marine use. Ideal for cold starts down to -10°C or high-heat operation up to 120°C engine temps. Replace the additive treatment with each major fuel fill-up or seasonally before long storage to keep your system peak-ready.

Frequently Asked Questions

Is it safe for all diesel marine engines? Yes, works with turbo, non-turbo, catalytic converters, and DPF filters without issues.

How much fuel does 1 liter treat? Up to 500 liters of diesel, perfect for large tanks on boats.

Can I use it year-round? Absolutely, add every fill-up for continuous cleaning and protection against marine fuel problems.