Diesel Aid Treatments

23 February 2026

We like to think our Engine will not Fail!! Gone are the days of filling up your tank and forgetting about it!! Fuel quality deteriorates faster than you think

Lower sulphur diesel causes a range of problems - be it for the leisure user, work boat or commercial charter.

Fuel contamination is an increasingly common cause of engine failures, especially in the marine industry. This microbial growth, known as Diesel Bug, is a mixture of bacteria, yeasts, and moulds that forms a slime in your fuel tank. When disturbed, it blocks fuel filters and disrupts fuel lines. Symptoms include difficulty starting, fuel starvation, irregular running, and black exhaust smoke.

Marine16 NZ offers the most effective fuel treatment available today. Our specialty is preventing or curing the so-called diesel bug.

Our Diesel Fuel Additive nz -  Diesel Fuel Complete is unique in the marketplace, providing the full range of additives needed to ensure your fuel is suitable for operating our boats in the marine environment. 

If you are suffering from the headache of constantly changing blocked filters, rest assured, you are not the only one. As many of you tell us, more fishermen and boat owners across all sectors, including yachts, are reporting an increase in blocked filters.

The cause is easy to identify and straightforward to fix. The main culprit is the ‘Diesel Bug’. This term refers to the bacteria, yeasts, and moulds that the fuel absorbs from the air. These bugs attach themselves to water droplets present in the fuel and sink to the bottom of the tank, where they feed on the diesel above. They double in number every 20 minutes - yes, every 20 minutes — living for just 18 hours while they secrete waste before dying. It is the combination of this waste and the dead bugs that forms the sludge blocking your filters.

One of the things you are probably now asking is how has water found its way into my fuel tank? It gets there through condensation, absorption, and can even be present when you purchased it. 

Whichever way water has found its way into your tank, the only way to ensure peace of mind is to remove the water from the fuel. 

Diesel Bug Treatment NZ

Diesel Bug Treatment does exactly what it says. Our diesel bug treatment is a biocide blend, specially formulated to prevent or eliminate fuel spoilage organisms collectively known as "Diesel Bug."

A 100ml bottle is enough to prevent diesel bug growth in 2000 litres of fuel. For serious contamination, mixing 100ml per 100 litres might be necessary. Over 15 years of Diesel Aid usage, a tank has rarely needed cleaning. For severe contamination, multiple doses may be required to break up and remove the biological sludge that forms.

Our diesel bug treatment nz disperses into both the water and fuel phases in your tank and remains active for over a year at both high and low temperatures. 

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