Carmarthen Fuel Prices

Find the cheapest petrol and diesel in Carmarthen. Compare live prices from local fuel stations, updated hourly from the official Fuel Finder feed.

Fuel price answer

cheapest petrol and diesel in Carmarthen

As of 2 October 2026, the cheapest unleaded petrol in Carmarthen is 171.9p/L at Murco Derwydd Services, the cheapest diesel in Carmarthen is 198.9p/L at Murco TANERDY GARAGE. Across 7 stations, unleaded averages 173.2p/L and diesel 199.6p/L.

Unleaded (E10)

171.9p cheapest

Avg 173.2pHigh 174.9pSpread 3.0p7 priced

Diesel

198.9p cheapest

Avg 199.6pHigh 199.9pSpread 1.0p7 priced

Cheapest Unleaded (E10) in Carmarthen

  • 1. Murco — Derwydd Services · CARMARTHEN171.9p
  • 2. Murco — TANERDY GARAGE · CARMARTHEN171.9p
  • 3. Murco — GWALIA GARAGE · CARMARTHEN171.9p
  • 4. Morrisons — MFG MORRISONS CARMARTHEN · CARMARTHEN173.9p
  • 5. Valero — ASCONA TENBY ROAD SERVICE STATION · CARMARTHEN173.9p

Cheapest Diesel in Carmarthen

  • 1. Murco — TANERDY GARAGE · CARMARTHEN198.9p
  • 2. Murco — GWALIA GARAGE · CARMARTHEN198.9p
  • 3. Murco — Derwydd Services · CARMARTHEN199.9p
  • 4. Morrisons — MFG MORRISONS CARMARTHEN · CARMARTHEN199.9p
  • 5. Esso — ASDA WHITE MILL EXPRESS PETROL · CARMARTHEN199.9p

Data freshness

Updated 30 Sept 2026, 08:49

Methodology

PetrolPal groups stations by country, region, and city from postcode-derived location data. Local pages are designed to help drivers compare nearby petrol and diesel prices before choosing where to fill up.

Citation

Source: PetrolPal, using official UK forecourt fuel price data. Cite: https://petrolpal.co.uk/fuel-prices/wales/carmarthen

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About Carmarthen Fuel Prices

PetrolPal tracks live fuel prices in Carmarthen using official UK Government data, updated hourly. Compare petrol and diesel prices from supermarkets, branded stations, and independents to find the cheapest fuel near you.

Prices in Carmarthen are based on stations in the Wales. View the Carmarthen statistics page for detailed price analytics including brand averages, price distribution, and historical trends.

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