Keeping your boat’s engine in top condition starts with caring for the fuel you put into it. Over time, diesel in marine tanks can pick up water, grow microbes, and form sludge that clogs filters and wears down critical parts. By adding Fuel Additives regularly, you stop oxidation and gum formation before they begin. This simple step preserves the quality of your diesel, maintains clean injectors, and prevents the costly downtime of unexpected breakdowns. 

When fuel stays fresh, engines fire up more easily and run more smoothly. Water in your tank causes corrosion inside pumps, pipes, and injectors. A reliable Fuel Additives formula separates water from the fuel, so you can drain it away before it harms metal surfaces. At the same time, biocides in these treatments eliminate bacteria and fungi—often called “diesel bugs”—that feed on trace moisture and create sludge. Once your engine sees cleaner fuel, exhaust smoke diminishes, combustion improves, and you enjoy a better fuel economy. 

For vessels that rely entirely on diesel, a specialized Diesel Fuel Additive takes protection even further. Detergents in this product gently clean existing deposits from combustion chambers and injectors, restoring efficiency. Cetane improvers boost ignition quality, giving you faster, quieter cold starts and preventing knocking. In cooler temperatures, cold-flow enhancers in Diesel Fuel Additive keep fuel from gelling or clogging filters, so you avoid sudden loss of power when you need it most. Corrosion inhibitors coat internal metal parts, extending the life of pumps and injectors, while a long-lasting biocide package keeps microbes at bay for weeks on end. 

Adding these treatments to your routine is easy. Simply measure the dose recommended for your tank size each time you refuel and pour it in before adding diesel. If you ever notice water layers or sludge, drain or clean the tank once, then resume regular dosing. Follow the manufacturer’s instructions on quantity per litre or gallon—too little won’t protect fully, and too much won’t improve results. Within a few uses, you’ll see longer filter life, reduced smoke, and more consistent engine performance. 

Choosing a marine-grade product means you’re investing in peace of mind on the water. Quality Fuel Additives and Diesel Fuel Additive are tested under real marine conditions to ensure they perform in salt spray, heat, humidity, and vibration. Expert support teams can help match the right treatment to your vessel’s size and operating profile. Fast local delivery across New Zealand means you never run out of the care your engine needs. 

Don’t wait until you’re stranded or stuck in port. Protect your engine today with the right Fuel Additives and specialized Diesel Fuel Additive. Your next voyage will be smoother, cleaner, and more efficient—and you’ll spend less time on maintenance and more time enjoying the open water.