Marine Fuel Additives

Marine Fuel Treatment and Additives for Every Boat Owner

Whether you captain a diesel-powered trawler on the open ocean or dock a small gas-powered pontoon at a freshwater lake, Fuel Ox has the right marine fuel treatment for you. Our marine formula products are engineered for both gasoline and diesel marine engines, providing full-spectrum protection for any type of vessel.

Since 2014, Fuel Ox has developed advanced fuel treatment solutions that not only support smoother performance and cleaner emissions but also tackle the very different fuel related problems faced by gas and diesel boat owners. From ethanol fuel related damage in gas to bacterial contamination in diesel, our solutions are built to protect your investment.

Benefits of Our Marine Fuel Treatment Products

• Compatible with both gasoline and diesel marine engines
• Improves fuel efficiency by up to 10% or more
• Reduces soot on your transom and keep bacteria from growing in diesel tanks
• Protects against ethanol fuel related damage and phase separation in gas
• Keeps fuel fresh for up to two years during storage
• Reduces corrosion, deposits, and varnish in the entire fuel system
• Supports all major fuel system components including filters, injectors, fuel lines, and intake valves

Fuel Ox Marine® With Combustion Catalyst Powers Performance

Fuel Ox Marine® With Combustion Catalyst is a powerful all-in-one treatment that improves combustion efficiency and protects every component of your fuel system – from fuel tank to fuel injectors. Whether you run gas or diesel, this formula optimizes performance, reduces waste, and keeps your entire fuel system cleaner for longer.

For Gasoline Boat Owners

Most gasoline-powered boats are smaller vessels used for fishing, skiing, or short-range cruising on freshwater lakes and coastal areas. These outboard setups often sit idle during the off-season, making storage a major concern – especially due to ethanol.

The biggest issue? Phase separation. When moisture interacts with ethanol, it creates a chemical reaction that pulls the alcohol out of the gas, separating it from the rest of the fuel. This results in unusable fuel that can stall your engine, damage small engines, and leave you stranded.

Fuel Ox emulsifies water, allowing it to burn cleanly and safely with the fuel. It also provides cleaning action for carburetors, prevents gum, and reduces varnish buildup, especially after long-term storage.

For Diesel Boat Owners

Diesel boaters often operate larger vessels that cover longer distances or run year-round. Their concerns differ dramatically from gas users – focusing more on fuel economy, soot, microbial growth, and long-term storage stability. Fuel Ox Marine® With Combustion Catalyst addresses these concerns by improving combustion, removing microbial threats, and stabilizing diesel fuel.

Fuel Ox Marine® Winter Shock Protects During Storage

When your boat sits idle through the colder months, untreated fuel deteriorates quickly. That’s where Fuel Ox Marine® Winter Shock comes in. It stabilizes gas and diesel fuel, keeps fuel fresh for up to two years, and prevents ethanol damage and phase separation.

No need to drain your tank or worry about alcohol separation – just add the treatment before long-term storage and let it go to work. It’s a smart alternative to relying on generic brands like Sea Foam or Quicksilver.

Marine Fuel Treatment Keeps Boats Running Clean and Smooth

From California to coastal Maine, marine conditions are tough on fuel systems. A single contaminated filter or fouled injector can mean downtime, performance loss, or expensive repairs. That’s why Fuel Ox treatments are formulated to support your entire fuel system, especially during peak season.

Gasoline users benefit from:

• Prevention of ethanol fuel related damage and phase separation
• Cleaner starts, better throttle response, and improved fuel stability

Diesel users benefit from:

• Reduced soot buildup
• Protection from algae, corrosion, and bacterial contamination
• Stabilized fuel and supported engine components like intake valves, filters, and injectors

Fuel Stabilizer for Boats Prevents Fuel Breakdown

Leaving untreated fuel in your tank during storage is a recipe for problems. Moisture, algae, and time can destroy fuel quality, damage injectors, and clog your filter. Our stabilizer is formulated to protect gas and diesel fuel, especially in small engines and boats stored for long periods.

Whether you use it in a standby vessel or a fishing rig, the formula works while your boat is at rest—extending shelf life, reducing deposits, and minimizing harm from fuel breakdown. It’s a critical step in protecting your equipment, your oil, and your ability to run without interruption.

Marine Fuel Additives Support Engine Longevity

Your fuel system isn’t just the tank and injectors – it includes everything from your fuel lines to the oil you burn and the carburetors you clean. Fuel Ox marine additives are designed to support your engine, protect it from ethanol, and improve performance trip after trip.

Gasoline boaters will appreciate smoother idles, cleaner carburetors, and protection from ethanol damage. Diesel users will notice longer injector and filter life, improved fuel economy, and reduced strain on emissions systems. The result is fewer service visits, fewer claims, and greater peace of mind.

Gas Additive for Boats Optimizes Every Fill Up

Modern gasoline includes ethanol, which attracts moisture, leads to phase separation, and causes corrosion and stalling if left untreated. Fuel Ox gas additives are designed to protect your fuel system from the inside out.

With each fill, you get:

• Dispersed water and neutralized alcohol buildup
• Cleaner injectors, better throttle response, and reduced deposits
• A safe, reliable alternative to sea foam, quicksilver, and sta bil additives

Every quart, every label, every bottle of Fuel Ox is backed by real customers who continue to choose us for safe, proven protection. Add us to your maintenance routine and experience the difference from the very first start.