The oil industry is full of technical terms and products can have several names depending on the type of product or region which can be confusing especially if you are a new oil consumer. To try and help explain some of these terms we have created an appendix which explains some common terms within the trade.

4 Wheeler Tanker

Often mistaken for a 4x4 vehicle, this vehicle is a small, shorter wheel base tanker ideal for getting to properties with restricted access. Space on the smaller vehicles is at a premium, especially during busy winter periods, so please order in advance if you require this size vehicle. If requesting a quote please don't forget to select this option. 

6 Wheeler Tanker

Our fleet consists of several 6 wheeler wagons as these carry enough fuel to get to multiple drops while being agile enough to get down country lanes and property driveways. 


Available for all types of fuel and for different purposes such as anti-wax for gas oil (See gas oil additives), fuel enhancers for Aga style cookers or boilers (See premium kerosene products)


This is our premium kerosene which has been developed for use in Aga style range cookers to improve the overall efficiency and ensure a clean burn meaning less sooty carbon build ups in the cooker. 


An additive added to fuel at the terminal during winter months to stop gas oil "Waxing" up. Also available as an extra product which we can add to summer fuel if you plan to store it over the winter period. Click here for more details


Anti-bug is an additive used to control and inhibit the growth of any bacteria which may form in fuel. It is more common in gas oil (red diesel) and tends to grow where water is present i the tank. Anti-bug kill additive will eradicate any growth in the tank and Anti-bug protect additive will prevent the growth from forming in an unaffected fuel tank.

Baby Tanker

Also known as our Mini Tanker or 2 wheeler. This is our smallest vehicle, ideal for those properties with restricted access. This vehicle usually covers the south Cumbria region but please ask if you need the "baby" tanker and we can confirm if it covers your area. 


This is the area between a twin skinned tank designed to hold fuel if the inner skin were to develop a leak. A bund can also be built from concrete or masonry then rendered around a single skinned tank to hold any oil spills. 


Boilerjuice is a slang term for kerosene heating oil. 

Diesel Bug

The first sign of microbiological contamination is often continuous blocking of filters with a slimy substance, which can range in colour from black to light brown. It is caused by water in the tank which provides the "bug" with oxygen while the fuel provides nutrients. It forms as a slimy layer between the two fluids and can get drawn into vehicles/machinery when the level reaches the outlet. This can be treated by using an Anti-bug additive.


FAME stands for Fatty-acid methyl ester, commonly known as bio-diesel. This may be present in fuel blended in by the refinery. The addition of FAME can increase the chances of developing "Diesel bug". It's effects can be combated with the use of Gas oil extra additive. For more information see our infograph on "what is diesel bug"

Gas oil

A red coloured diesel which has a lower tax level and can only be used in registered agricultural machinery like tractors, commercial vehicles like diggers and cranes etc and other non-road vehicles like boats. Otherwise known as:
Red diesel
Tractor diesel
Pink diesel
35 second oil
See the gas oil safety data sheet for more details

Heating oil

Heating oil is a form of fuel burnt by specialised boilers to heat homes and industrial properties. It is commonly known as kerosene heating oil but is also known as:
  • Kero
  • 28 second burning oil
  • Aga fuel 
  • Boiler juice
  • Domestic oil
Kerosene is a straw coloured oil which is stored in heating oil tanks and used by properties which are not on the main gas grid. Due to its low waxing point it remains fluid at extremely low temperatures making it the perfect choice for heating oil. 


A low sulfur straw coloured oil used in domestic heating systems. Otherwise known as: 
burning oil, 
boiler juice, 
28 second oil, 
See the kerosene safety data sheet for more details


This is our premium kerosene which has been developed for use in domestic heating boilers. Keromax improves the overall efficiency of the system and helps slow down the build up of sooty deposits around the injectors & burners which lead to blockages. Click here for more information.

Offset Fill Point

This is the point that a tank is filled from which is isolated from the tank. Usually found when a tank is located in a building or tight space and the only way to connect is via a pipe outside, connected to the tank. Offset fills need to conform to regulations as there is a risk of overfilling as the tank level cannot be monitored while filling. Please try to be accurate with the quantity when ordering to avoid the possibility of an overfill. 

Overfill device

A device fitted to the tank which can sound an alarm or shut of the delivery of oil to prevent spills from over filling.

Premium Heating Oil

Premium heating oil is standard kerosene which has had an additive added to increase the efficiency of the fuel. Aga style range cookers benefit from premium heating oil as it offers a cleaner, more consistent burn which prevents the sooting up of the cooker.


This is a service we can provide where by we visit your tank on a regular schedule to ensure you never run out of oil. Ideal for holiday homes or those unable to check their tank regularly. Please ask a member of our sales team for more information.

White Diesel

A clear/white coloured diesel fuel for use in road vehicles. Also known as:
Road diesel
Landrover diesel
See the Derv safety data sheet for more details


Gas oil tends to "wax" up at very low temperatures which leads to fuel starvation in machinery as it cannot flow properly through the engine. Gas oil is usually treated at the refinery during winter months to help reduce this but Anti-wax additive can be added during the delivery to increase its resistance to colder temperatures. Anti-wax is also best added if you buy during the summer months and intend to store it over the winter.


An electronic device which sends a signal from your tank to a unit plugged in the house showing the level of the oil in the tank. 

Why choose WCF Fuels North West?

Quick & Efficient Deliveries,
Friendly staff,
Competitive prices,
High Quality Heating Oil Products,
Range of Additives available,
Click here

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Do you use Red Diesel?

Use our gas oil additives to improve the fuel efficiency and performance of your tractor or machinery.

Maintains engine parts and increases storage properties.

Click Here

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