Fuel & Additives

About Fuel & Additives

What are fuel additives & engine treatments?

One of the biggest problems with boating fuel and the need for engine treatments are interactions with polymer components in the boat's fuel system and water issues.
Being out on the water all day gives your boat excessive exposure to water, and that will play havoc with many of your systems.
Water helps facilitate corrosion, as well as the physical properties of water means that with excessive heat and cold, water can expand and get into all sorts of nooks and crannies of your motors and mechanical parts.

Engine treatments are an important part of eliminating this with proper lubrication, fuel stabilization, and winterization are a must for marine engines.
Otherwise, over time, water can begin to promote oxidation and even pitting throughout your engines.
Organic material might also propagate, which can cause blockages, as well as bad fuel which will ruin your engines.

Fuel additives are extremely effective at solving these problems.
Which is why Defender offers a wide variety of marine-specific additives to keep your boat running smoothly.

Types of fuel additives & engine treatments

Water absorbents: Petroleum products and water do not mix. At least they don't mix well. Introducing water absorbents to your fuel will help absorb water from fuel and allow it to be safely eliminated.

Detergents: Keeping your fuel system clean and preventing the buildup of carbon are important engine treatments for keeping fuel lines and filters open and flowing well. Buildup of debris, carbon deposits, and fuel soluble materials can severely shorten the life of your motor if left unchecked. Detergents are especially important diesel treatment.

Fuel stabilizers: If your watercraft is going to sit for long periods of time without use, stabilizers, such as fogging oil, provide a protective layer for the fuel sitting in a gas tank. Often a hydrocarbon, such as methyl alcohol, which bonds with water, yet still remains combustible, fuel stabilizers are good fuel additives for diesel treatments and a proper way to ensure that the remaining fuel left in your tank is still good when you hit the water next season.

Biocides: How can anything live in fuel? Water is a natural environment for nearly all life, and the presence of water in your fuel still provides a place for microbes to live, feed, reproduce, and die. Biocides kill bacteria and fungus to rid fuel system of their waste and deposits, which will ruin your filters, connections, and eventually your engines.

Fuel & Additives

Yamaha Ring Free Plus Fuel Additive - ACC-RNGFR-PL-32

ValvTect BioGuard Diesel Plus 6 Fuel Treatment - 32 oz - BGDP632

Seafoam Motor Treatment and Spray Combo - SF-SS

Sta-Bil Diesel Stabilizer - 32 oz - 22254

MDR Ethanol Gasoline E-Zorb Water Remover - 16 oz - MDR-574

Star Brite Diesel Water Absorber - 084616

ValvTect Diesel Guard Supreme Plus High Performance Diesel Additive - DFMS32

MDR Gasoline Water Zorb Water Absorber - 16 oz - MDR-567

Hammonds BioborMD Diesel Fuel Additive - BBMD16EZ01US

MDR Diesel Fuel Water Zorb Water Absorber - 16 oz - MDR-559

Hammonds BioborJF Diesel Fuel Additive

Yamaha Ring Free Plus Fuel Additive - ACC-RNGFR-PL-12

Seafoam Ultimate Oil Stabilizer - OS32

Star Brite Star Tron Ring Cleaner - 95616

Star Brite Star Tron Diesel Additive

Seafoam High Mileage Motor Treatment - HM16

Seafoam Marine PRO Engine Fuel Treatment - MP20

Star Brite Star Tron Enzyme Fuel Treatment for Gasoline

Mercury Quickleen Gasoline Engine Treatment - 12 oz - 8M0047931

Seafoam Motor Treatment

Star Brite Star Tron Enzyme Fuel Treatment - Diesel Automotive Formula - 14408

Star Brite EZ Store EZ Start Diesel Storage Additive - 084408

BRP Carburetor and Choke Cleaner - 777191

Mercury Quickare Gasoline Fuel Treatment - 12 oz - 8M0047930

Sta-Bil 360 Marine Formula Ethanol Gasoline Treatment

BRP 2+4 Gasoline Fuel Conditioner and Stabilizer - 8 oz - 766216

Star Brite Star Tron Stabilizer+ Fuel Storage

Seafoam Fuel Injector Cleaner and Upper Cylinder Lubricant - IC5

Star Brite Star Tron Enzyme Fuel Treatment - Small Engine Formula - 14301

Liqui Moly Marine Super Diesel Additive

Star Brite Star Tron Fuel System & Injector Cleaner - 96604

Star Brite EZ-to-Store EZ-to-Start Gasoline Stabilizer

Sta-Bil Gasoline Fuel Stabilizer

ValvTect Marine Gasoline Additive

Liqui Moly Marine 4T Additive Shooter - 25102

Liqui Moly Marine Gasoline Stabilizer Shooter - 25100

About Fuel & Additives

What are fuel additives & engine treatments?

Types of fuel additives & engine treatments

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