Fuel Prices in Carmarthenshire
Today's average petrol and diesel prices in Carmarthenshire, updated twice daily.
Average Prices
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Frequently Asked Questions
What is the average petrol price in Carmarthenshire?
Average petrol (E10) prices in Carmarthenshire are updated twice daily. Visit this page regularly to see the latest figures.
Where can I find the cheapest diesel in Carmarthenshire?
Use our comparison tool above to search by postcode and find the cheapest diesel forecourts in Carmarthenshire. Supermarket forecourts such as Asda, Tesco, Sainsbury's, and Morrisons often have the lowest prices.
How often are fuel prices updated for Carmarthenshire?
Fuel prices are updated twice daily, so you always see recent data.
Is premium unleaded (E5) worth the extra cost in Carmarthenshire?
E5 super unleaded has a higher octane rating (97+ RON) which may benefit performance cars. For most everyday vehicles built after 2011, standard E10 is recommended and cheaper.