Live FeedMay 2026

Cheapest Diesel Prices in Carmarthen.

MURCO

GWALIA GARAGE

177.9p

City Average

181.9p

Potential Saving

4.0p

Compared to local average

Nearby Stations

M

MORRISONS

PARC PENSARN

179.9p

+2.0p

M

MURCO

TANERDY GARAGE

179.9p

+2.0p

M

Murco

DERWYDD GARAGE

181.9p

+4.0p

V

VALERO

LYSONNEN ROAD

183.9p

+6.0p

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Fuel Prices in Carmarthen

Looking for the cheapest diesel in Carmarthen? This page compares the latest available prices from local filling stations so drivers can quickly see where fuel is currently cheapest.

The cheapest listed diesel price in Carmarthen is currently 177.9p, while the city average sits at 181.9p. Prices may vary depending on brand, location, traffic demand, and how frequently stations update their pump prices.

We currently track 7 stations in Carmarthen for diesel. The lowest listed price today is 177.9p, while the highest visible price is 184.9p. That means drivers in Carmarthen could save up to 7.0p per litre simply by choosing a cheaper local forecourt.

How Much Can Drivers Save in Carmarthen?

The difference between the cheapest and most expensive diesel in Carmarthen today is 7.0p per litre.

On a 50-litre fill-up, that could mean a saving of £3.50.

Stations in carmarthen

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FAQs About Fuel Prices in Carmarthen

How often are fuel prices updated in Carmarthen?

Fuel prices are updated whenever fresh pricing data is available from local stations and suppliers.

Why do fuel prices vary between stations in Carmarthen?

Prices can vary based on station brand, location, local competition, traffic flow, and operating costs.

Where can I find the cheapest petrol or diesel in Carmarthen?

This page highlights the cheapest currently available fuel price in Carmarthen and compares nearby alternatives.