Marine Dee-Zol

Professional Fuel Care for Marine Diesel Engines

Marine Dee-Zol is a commercial-grade, multifunction diesel fuel treatment engineered specifically for boats and marine diesel applications. Based on the proven performance of Dee-Zol Concentrate, it incorporates enhanced detergency and water-control technology to address the challenges unique to marine fuel systems.

Unlike highway vehicles that consume fuel regularly, many boats spend extended periods in storage while operating in humid environments where moisture accumulation and fuel degradation become greater concerns. Marine Dee-Zol helps maintain fuel quality throughout the boating season while protecting fuel systems during periods of inactivity.

Ideal for recreational boats, commercial vessels, workboats, fishing boats, sailboats with auxiliary diesel engines, marinas, and marine service professionals.

Cleans the Entire Fuel System

Marine Dee-Zol helps remove deposits from injectors, combustion chambers, piston rings, and other fuel system components that can reduce engine performance over time.

Cleaner fuel system components promote improved fuel delivery, smoother engine operation, and more efficient combustion.

Improved Water Control for Marine Applications

Water contamination is one of the most common fuel-related challenges facing marine diesel engines.

Marine Dee-Zol incorporates enhanced water-control technology to help manage moisture in marine fuel systems, reducing the likelihood of water-related fuel problems while helping minimize conditions that encourage microbial contamination.

Improves Combustion and Engine Performance

Marine Dee-Zol promotes more complete combustion through improved fuel quality and cetane enhancement.

Regular treatment can help:

• Improve engine responsiveness
• Increase available horsepower
• Improve fuel economy
• Reduce smoke and exhaust emissions
• Promote smoother engine operation

Stabilizes Fuel During Storage

Marine fuel often remains in tanks for extended periods between outings or throughout the off-season.

Marine Dee-Zol helps stabilize stored diesel fuel, preserving fuel quality and supporting dependable engine performance when boating season returns.

Professional Performance in a Consumer-Friendly Package

Marine Dee-Zol delivers the same commercial-grade fuel treatment technology trusted by fuel professionals, packaged in convenient sizes for recreational boat owners and marine service technicians.

Its concentrated 1:2400 treatment ratio provides economical protection for both occasional and frequent marine use.