Which type of heating oil should I order?

There are two main types of heating oil used in the UK: Kerosene 28 and Gas Oil (Red Diesel). Choosing the right one is essential for your boiler to run efficiently and safely.

 

Two main types of heating oil

Kerosene 28 (also known as "28-second oil")

• The most common fuel for domestic boilers
• Clear to pale yellow in colour
• Often simply referred to as “heating oil”

Gas Oil (also known as "Red Diesel" or "35 second oil")

• Usually used in older heating systems, commercial boilers, or agricultural machinery
• Dyed a bright red colour to differentiate it from regular diesel

How can I tell which oil my system uses?

• Check the sight gauge on your oil tank:
• Yellow-ish fuel likely means Kerosene
• Bright pink/red fuel likely means Gas Oil
• Look at boiler documentation or labels on your tank
• Ask your service technician if you're unsure, they’ll be able to confirm the right fuel type

💡 Tip: Consider a heating oil additive

We recommend adding an oil additive to Kerosene 28, or choosing Premium Kerosene (which includes the additive). It can help by:

• Promoting a cleaner burn
• Extending the shelf life of your oil
• Reducing sludge and water build-up in your tank

You can add this option when placing your order with BoilerJuice.

💬 Still have questions?

Our team is here to help, call us on 01480 775454 or check out our Tips and Advice articles.