Heating Oil Prices - Northern Ireland. Pence per Litre in Northern Ireland As of 04:59:16 on 15/03/2020 for orders over 900 litres. Please select your country below: Heating Oil Price by County. Over the years we’ve built strong relationships with heating oil suppliers in all of the counties throughout the United Kingdom. Every day we check the lowest 1,000 litre price for heating oil (Kerosene28) from our network of trusted Suppliers across postcodes in Armagh, Ballymena, Belfast, Coleraine, County Down, Derry, Dungannon, Lisburn, Lurgan and more. We then take the lowest price in each postcode district and use it to plot our daily average heating oil price for Northern Ireland (Including VAT at 5%). We use the same method to track heating oil prices in NI. Our Red Diesel price chart shows our average price for Northern Ireland, however, if you’d like to view prices for a specific postcode area, simply click below to get a free, personalised online quote.