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Petrol and diesel prices in Carmarthenshire
Pump prices at 9 forecourts in Carmarthenshire, from the open price feeds UK fuel retailers have to publish. These were the prices on 7 October 2026. The Driveboard map has them live, and sorts the forecourts near you by price.
See live prices on the map171.9pcheapest unleaded (e10)
195.9pcheapest diesel
189.9pcheapest super unleaded (e5)
176.5paverage unleaded
Average and cheapest by fuel
| Fuel | Average | Cheapest | Where |
|---|---|---|---|
| Unleaded (E10) | 176.5p | 171.9p | Asda SA15 5TR |
| Super unleaded (E5) | 191.1p | 189.9p | Valero SA14 6RR |
| Diesel | 200.7p | 195.9p | Asda SA32 7EN |
| Super diesel | 217.2p | 215.9p | Valero SA14 6RR |
Forecourts in Carmarthenshire
| Forecourt | Postcode | E10 | E5 | Diesel |
|---|---|---|---|---|
| Asda | SA15 5TR | 171.9p | 197.9p | |
| Valero | SA14 6RR | 172.9p | 189.9p | 199.9p |
| Morrisons | SA31 2NF | 173.9p | 189.9p | 199.9p |
| Morrisons | SA14 9UZ | 173.9p | 189.9p | 197.9p |
| Asda | SA15 1BX | 174.7p | 196.7p | |
| Valero | SA15 3TF | 174.9p | 189.9p | 199.9p |
| Esso | SA33 4JW | 174.9p | 195.9p | 201.9p |
| Asda | SA32 7EN | 174.9p | 195.9p | |
| Asda | SA4 0FU | 196.9p | 215.9p |
Questions
Where is the cheapest petrol in Carmarthenshire?
On 7 October 2026 the cheapest unleaded (E10) in Carmarthenshire was 171.9p at Asda SA15 5TR, against an average of 176.5p. Prices change daily; the Driveboard map has them live.
Where is the cheapest diesel in Carmarthenshire?
On 7 October 2026 the cheapest diesel in Carmarthenshire was 195.9p at Asda SA32 7EN, against an average of 200.7p.
Where do these prices come from?
From the open price feeds that UK fuel retailers are required to publish. Not every forecourt is in a feed yet, so some local stations may be missing.