Lacking in oxygen and water, fuels are hydrocarbons within  whom bacteria, yeast and mould do not proliferate. So why is fuel in the tank contaminated ?

When filling tanks, the temperature differences between the fuel contained in the delivery tank truck and your boat’s tank causes air condensation heavy with humidity.

Added to this is moist air which penetrates the vats and tanks through the vents. This additional moist air is accentuated in regions with a strong range of daily temperature variations.

This humidity laden air condenses in the top part of the tank and forms drops of water which stream down the walls.

 

This water, in particular more corrosive, in the event of sea air, can be found, with regards its density, in the bottom of the tank under the fuel in other words “as a leaven”.

From there, micro-organisms and bacteria with water and oxygen are going to develop and multiply at the water-fuel interface by nourishing themselves with hydrocarbon compounds from diesel or petrol.  As they develop, bacteria produces waste and filaments which migrate in the fuel. You will then notice a decline in the fuel’s quality which is expressed by a change in its look.  The diesel or petrol have become cloudy and strewn with waste and brown filaments. This bacteria production constitutes deposits with the presence of corrosive elements vis-à-vis components of the fuel circuit namely:  tanks, pumps, nozzles... 

Indeed, during their growth period sulphabacteria generates acid by-products and this from diesel’s sulphur elements.

Damage caused is easy to categorise:

- blocked filters and piping which lead to dysfunction with regards engine pumps. 

- corrosion of the tank and piping metal walls.

How to reduce the consequences  of these problems due to  the presence of bacteria  in the fuel?

The BACT-FUEL treatment is a quantity of 125 ml for 1250 litres of fuel.BACT-FUELhas a dual preventive and remedial action.  Its action reduces the risks of micro-organisms multiplying in the fuel at the water and fuel’s interface.

During the sailing period and in storage,  BACT-FUELL produces: 

- Internal cleanliness of tanks.

- An effective fight against mud, slime and corrosive by-products forming. 

- A reduction in the risk of surfaces and equipment breaking down or deteriorating.

We have seen it, BACT-FUEL destroys micro-organisms and bacteria by stopping any proliferation dead. 

But water, mud and sludge still remain at the bottom of the tank.  It is there that you need COMBIFUEL which decomposes these elements by eliminating them gradually. 

Thanks to its components, COMBIFUEL perfects the anti-bacterial treatment:

- by emulsifying the water.

- by dissolving mud, sludge and paraffin.

- by neutralising SO2 and SO3.

This treatment is simple. After treating your fuel with BACT-FUEL , you add COMBIFUEL to your tank, knowing that a quantity of 125 ml treats 500 litres of diesel. 

COMBIFUEL poured like so will emulsify anything that is found in the diesel.

Throughout sailing, your diesel treated will go via your pumps and will clean the different elements of the fuel system. 

You will also notice in the exhaust outlet that the smoke is white because loaded with water vapour. COMBIFUEL is thus in the process of being burnt.

Another appreciable extra is that COMBIFUEL improves the performance of your engine shown by a not insubstantial saving in fuel.