Cheapest Petrol & Diesel in Carmarthenshire Today
☆ SaveLast updated: · Prices refresh every 30 minutes from the UK government's Fuel Finder service.
Cheapest Petrol in Carmarthenshire
Cheapest Diesel in Carmarthenshire
Worth the Drive?
Diesel averages 9.5p less in Llanllawddog (154.9p vs 164.4p here). The round trip is about 9 miles each way, costing roughly £2.57 in fuel at 50 mpg. A 60‑litre fill would save £5.70 — a net saving of £3.13 after the return journey.
There are 2 fuel stations in Carmarthenshire reporting live prices via the UK government's Fuel Finder service. Unleaded petrol (E10) averages 150.9p per litre across 2 stations. Diesel (B7) averages 164.4p across 2 stations. Unleaded is 0.3p above the national average of 150.6p.
Use our fuel station finder to find the most economical place to fill up near you, or calculate the fuel cost of a longer trip from Carmarthenshire.
Fuel Stations in Carmarthenshire
| Station | Postcode | E10 | E5 | B7 | SDV |
|---|---|---|---|---|---|
| Murco, Burry Port Carmarthenshire | SA16 0BS Super-market | 149.9p Cheapest | 172.9p | 164.9p | – |
| Murco, Cynwyl Gaeo Carmarthenshire | SA19 8DT Super-market | 151.9p | 168.9p Cheapest | 163.9p Cheapest | – |
Station Map
Nearby Towns
Average Petrol and Diesel Prices in Carmarthenshire (pence per litre)
30-Day Price Trend in the Swansea Region (pence per litre)
Daily averages across all stations in the Swansea postcode area over the last 30 days. Carmarthenshire sits within this region.
What does fuel cost a typical driver in Carmarthenshire?
At current prices, a typical driver covering 12000 miles a year in a petrol car averaging 35 mpg spends about £2352/year on fuel in Carmarthenshire (at 150.9p/L). That's £5 more than the UK average of £2347. Across the wider Swansea (SA) postcode area petrol averages 149.9p/L, working out at £2336/year.
A diesel driver doing the same 12000 miles at 50 mpg spends about £1794/year at Carmarthenshire's average diesel price of 164.4p/L. That's £2 less than the UK average of £1796. Across the wider Swansea (SA) postcode area diesel averages 161.8p/L — £1765/year.
Choose the right station — save £££
The cheapest petrol in Carmarthenshire is 149.9p/L and the most expensive is 151.9p/L — a 2.0p/L spread. Filling a 60‑litre tank at the cheapest vs the dearest saves £1.20.
For diesel the spread is 1.0p/L (163.9p cheapest, 164.9p dearest) — £0.60 saved on a 60‑litre fill.
Fuel Prices by Brand in Carmarthenshire
Average prices and cheapest station for each fuel brand in Carmarthenshire.
Murco Fuel Prices in Carmarthenshire
There is 1 Murco forecourt in Carmarthenshire. Petrol is 149.9p/L — 1.0p below the Carmarthenshire average. Diesel is 164.9p/L (0.5p above town avg). Live prices: Murco, Burry Port. Murco fuel prices across the UK →
Show station details
| Station | Postcode | E10 | B7 |
|---|---|---|---|
| Murco, Burry Port | SA16 0BS | 149.9p | 164.9p |
Murco Fuel Prices in Carmarthenshire
There is 1 Murco forecourt in Carmarthenshire. Petrol is 151.9p/L — 1.0p above the Carmarthenshire average. Diesel is 163.9p/L (0.5p below town avg). Live prices: Murco, Cynwyl Gaeo. Murco fuel prices across the UK →
Show station details
| Station | Postcode | E10 | B7 |
|---|---|---|---|
| Murco, Cynwyl Gaeo | SA19 8DT | 151.9p | 163.9p |
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