Every petrol station in Carmarthen that reports to the Government's Fuel Finder scheme — 7 of them — with the price each one reported and the time it reported it.
The cheapest fuel in Carmarthen right now
- Cheapest unleaded (E10)
- 166.9p at Derwydd Services reported 06:44 on 10 Sept 2026
- Cheapest diesel (B7)
- 189.9p at Tanerdy Garage reported 06:14 on 15 Sept 2026
- Cheapest super unleaded (E5)
- 175.9p at Derwydd Services reported 12:45 on 14 Sept 2026
How Carmarthen compares
- Unleaded here averages 169.6p — 2.4p below the UK average of 172.0p.
- Diesel here averages 192.5p — 2.7p below the UK average of 195.2p.
- 7 of 7 report unleaded, 7 report diesel.
An average across reporting stations, one vote each — not what drivers here actually pay, which would need sales volumes nobody publishes.
All 7 petrol stations in Carmarthen
- Ascona Tenby Road Service Stationunleaded 171.9p · diesel 195.9p
- Asda White Mill Express Petrolunleaded 173.9p · diesel 192.9p
- CKs Supermarketunleaded 168.9p · diesel 192.9p
- Derwydd Servicesunleaded 166.9p · diesel 193.9p
- Gwalia Garageunleaded 167.9p · diesel 189.9p
- Mfg Morrisons Carmarthenunleaded 169.9p · diesel 191.9p
- Tanerdy Garageunleaded 167.9p · diesel 189.9p
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⚠ Prices are as reported to the Fuel Finder scheme, with the time each was reported — not a promise of what you will pay. Retailers have up to 30 minutes to report a change. Always check the price on the pump. Collected 19:32 on 17 Sept 2026.
Report a price discrepancy · Fuel price data from Fuel Finder (DESNZ), used under the Open Government Licence v3.0.