Marine 16 Diesel Bug Treatment (DBT) is a Biocide formulated specifically for preventing or eradicating the microbial contamination known collectively as Diesel Bug.

DBT – Diesel Bug Treatment is a broad spectrum biocide formulated to prevent or eradicate the microbial contamination of fuel from Yeast, Mould and Bacteria commonly known as Diesel Bug.

A 100ml bottle is sufficient to prevent diesel bug growth in 2000 litres of fuel (50ppm). For serious contamination this should be increased to 100ml to 100 litres (1000ppm).

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

Marine 16’s Diesel Bug Treatment is the fuel treatment of choice for the RNLI, The Royal Marines, Sea Start and River Canal Rescue as well as being number 1 in the Practical Boat Owner magazine review.

Overdosing will not harm your engine.

Note: Diesel Bug exists because there is water, it is essential to drain the water out of the tank regularly, at least once per month.

Please see below for a list of supplier sizing guides. If you have any issues, please don't hesitate to get in touch. We're here to help.

If we are missing a supplier, please send us an email and we'd be happy to source the correct sizing guide for you.

We offer free shipping to all addresses in the Republic of Ireland for orders over €60 (large, bulky and heavy items like kayaks and boats are excluded from free shipping). Orders under €60 will be charged a flat €7.50 rate.

Click Here to view our Christmas Shipping Deadlines

If you live in Dublin and would like faster delivery we offer same day delivery with DoOrder. Orders will be delivered to you in the evening time. Available 7 days a week for just €10.

Orders are shipped with both Fastway and DPD Couriers. If you have a preference for who we ship your order with please specify this in the order notes.

All orders received before 12pm will be shipped the same day (Monday-Friday). Orders after this time will be shipped the next day. Once the item is shipped the approximate delivery time is 1-2 days

You will receive a tracking number when your items are sent. This tracking will show updates once your order has been collected by our couriers.

Delays may be experienced during certain times of the year and if this is the case we will contact you as soon as possible via email.

In delivering our best service, we are proud to offer same-day delivery on all orders in county Dublin for only €10. Orders for delivery to addresses in county Dublin will be offered this service for €10.00. If the order is placed before 1:00 pm, it will be dispatched that afternoon for delivery that evening (Monday-Friday). Orders placed after this time will be shipped the next day for delivery that day. this service also applies to orders placed at the weekend.

We reserve the right to change these conditions for exceptionally large or heavy items, items of a hazardous nature or if an item has run out of stock and has to be specially ordered. We will keep you posted of any changes to the best of our ability.

We offer shipping to all addresses in the United Kingdom for a flat rate of €14.95. We may not be able to ship large, bulky or heavy items. Please call for such items. Please note customs charges may apply.

International Shipping Charges

EU Near

Order Value	Shipping Charge
€1.00 - €99.99	€12.95
€100 - €299.99	€14.95
€300 and up	Free

EU Mid

Order Value