Live prices
Cheapest unleaded petrol (E10) in Carmarthen
7 stations reporting unleaded petrol (E10), ranked cheapest first.
The cheapest reported unleaded petrol (E10) in Carmarthen is £7.59 a gallon (166.9p per litre) at Murco, Derwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen (SA33 6TP). The average across 7 forecourts currently reporting this grade is £7.75 a gallon (170.5p per litre), so choosing the cheapest rather than an average-priced forecourt saves about £1.80 on a 50-litre fill. That local average is 2.0p per litre below the UK average of 172.5p.
The average has risen 0.2p per litre since yesterday. The average has risen 3.0p per litre since last week.
Prices last refreshed at 1:32pm on 20 September 2026, supplied through the official UK Government fuel price open data scheme and checked every 30 minutes.
| Station | Unleaded | Diesel | Premium | Super diesel | Updated |
|---|---|---|---|---|---|
 Derwydd Services (SA33 6TP)Derwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen | £7.59166.9p | £8.81193.9p | £8.00175.9p | ---- | 1h ago |
| Cks Supermarket (SA31 3HL)C K's Supermarket, Old ST. Clears Road, Johnstown, Carmarthen | £7.68168.9p | £8.77192.9p | ---- | ---- | 1h ago |
| Tanerdy Garage (SA31 2EY)Tanerdy Garage, Tanerdy, Carmarthen | £7.72169.9p | £8.77192.9p | £8.11178.5p | £9.16201.5p | 1h ago |
| Gwalia Garage (SA32 7DR)Gwalia Garage, Rhydargaeau, Carmarthen | £7.72169.9p | £8.77192.9p | £8.11178.5p | £9.16201.5p | 1h ago |
 Mfg Morrisons Carmarthen (SA31 2NF)24hParc Pensarn, Carmarthen, Carmarthenshire | £7.77170.9p | £8.86194.9p | £8.45185.9p | ---- | 1h ago |
 Ascona Tenby Road Service Station (SA33 5DT)24hLysonnen Road, Carmarthen, Carmarthen, Carmarthenshire | £7.81171.9p | £9.09199.9p | £9.09199.9p | £10.00219.9p | 1h ago |
 Asda White Mill Express Petrol (SA32 7EN)A40, Carmarthen, Carmarthen | £7.95174.9p | £8.86194.9p | ---- | ---- | 1h ago |
Prices are supplied through the official UK Government fuel price open data scheme (Open Government Licence v3.0) and checked every 30 minutes. Only stations reporting unleaded petrol (E10) appear here.
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Questions about unleaded petrol (E10) in Carmarthen
- Where is the cheapest unleaded petrol (E10) in Carmarthen?
- The cheapest reported unleaded petrol (E10) in Carmarthen is 166.9p per litre at Murco, Derwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen (SA33 6TP). The average across 7 forecourts reporting this grade is 170.5p per litre. Prices were last refreshed at 1:32pm on 20 September 2026 from official UK Government fuel price data.
- How many stations in Carmarthen sell unleaded petrol (E10)?
- 7 forecourts in Carmarthen currently report a price for unleaded petrol (E10) through the official UK fuel price open data scheme. Stations that do not sell or report this grade are not counted.