Carmarthen Fuel Prices

Find the cheapest petrol and diesel in Carmarthen. Live prices from 7 fuel stations, updated hourly from the official Fuel Finder feed.

Fuel price answer

cheapest petrol and diesel in Carmarthen

As of 4 August 2026, the cheapest unleaded petrol in Carmarthen is 155.9p/L at Murco GWALIA GARAGE, the cheapest diesel in Carmarthen is 177.9p/L at Murco TANERDY GARAGE. Across 7 stations, unleaded averages 160.0p/L and diesel 179.6p/L.

Unleaded (E10)

155.9p cheapest

Avg 160.0pHigh 162.9pSpread 7.0p7 priced

Diesel

177.9p cheapest

Avg 179.6pHigh 181.9pSpread 4.0p7 priced

Cheapest Unleaded (E10) in Carmarthen

  • 1. Murco — GWALIA GARAGE · CARMARTHEN155.9p
  • 2. Murco — Derwydd Services · CARMARTHEN157.9p
  • 3. Murco — TANERDY GARAGE · CARMARTHEN157.9p
  • 4. Morrisons — MFG MORRISONS CARMARTHEN · CARMARTHEN161.9p
  • 5. Esso — ASDA WHITE MILL EXPRESS PETROL · CARMARTHEN161.9p

Cheapest Diesel in Carmarthen

  • 1. Murco — TANERDY GARAGE · CARMARTHEN177.9p
  • 2. Murco — GWALIA GARAGE · CARMARTHEN177.9p
  • 3. Murco — Derwydd Services · CARMARTHEN179.9p
  • 4. Morrisons — MFG MORRISONS CARMARTHEN · CARMARTHEN179.9p
  • 5. Esso — ASDA WHITE MILL EXPRESS PETROL · CARMARTHEN179.9p

Data freshness

Updated 4 Aug 2026, 06:48

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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