Live prices
Cheapest petrol and diesel near SA31
10 forecourts within 5 miles of the centre of the SA31 postcode district, 5 of them inside SA31 itself.
The cheapest reported unleaded petrol (E10) within 5 miles of the centre of SA31 is £7.59 a gallon (166.9p per litre) at Murco, Derwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen (SA33 6TP). The average across 10 forecourts currently reporting this grade is £7.75 a gallon (170.4p per litre), so choosing the cheapest rather than an average-priced forecourt saves about £1.75 on a 50-litre fill. That local average is 2.0p per litre below the UK average of 172.4p.
The average has risen 0.5p per litre since yesterday. The average has risen 4.7p per litre since last week.
Prices last refreshed at 4:02am on 20 September 2026, supplied through the official UK Government fuel price open data scheme and checked every 30 minutes.
Unleaded Prices
Unleaded (E10)
- Highest
- £7.95/gal174.9p/L
- Average
- £7.75/gal170.4p/L
- Lowest
- £7.59/gal166.9p/L
Diesel Prices
Diesel (B7)
- Highest
- £9.09/gal199.9p/L
- Average
- £8.82/gal194.1p/L
- Lowest
- £8.72/gal191.9p/L
Premium Unleaded Prices
Premium Unleaded (E5)
- Highest
- £9.09/gal199.9p/L
- Average
- £8.37/gal184.2p/L
- Lowest
- £8.00/gal175.9p/L
Super Diesel Prices
Super Diesel (SDV)
- Highest
- £10.00/gal219.9p/L
- Average
- £9.44/gal207.6p/L
- Lowest
- £9.16/gal201.5p/L
Every station near SA31, cheapest unleaded first
| Station | Distance | Unleaded | Diesel | Premium | Super diesel | Updated |
|---|---|---|---|---|---|---|
 Derwydd Services (SA33 6TP)Derwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen | 4.7 miles | £7.59166.9p | £8.81193.9p | £8.00175.9p | ---- | 10h ago |
| Cks Supermarket (SA31 3HL)C K's Supermarket, Old ST. Clears Road, Johnstown, Carmarthen | 0.9 miles | £7.68168.9p | £8.77192.9p | ---- | ---- | 10h ago |
| Gwalia Garage (SA32 7DR)Gwalia Garage, Rhydargaeau, Carmarthen | 3.8 miles | £7.72169.9p | £8.77192.9p | £8.11178.5p | £9.16201.5p | 10h ago |
 Mfg Morrisons Carmarthen (SA31 2NF)24hParc Pensarn, Carmarthen, Carmarthenshire | 0.8 miles | £7.72169.9p | £8.81193.9p | £8.45185.9p | ---- | 10h ago |
| Oil 4 Wales Ltd Nantycaws (SA32 8BG)Nantycaws Filling Station Ltd, Llanddarog Road, Caerfyrddin, SA32 8BG, Caerfyrddin | 4 miles | £7.72169.9p | £8.72191.9p | ---- | ---- | 10h ago |
| Tanerdy Garage (SA31 2EY)Tanerdy Garage, Tanerdy, Carmarthen | 0.9 miles | £7.72169.9p | £8.77192.9p | £8.11178.5p | £9.16201.5p | 10h ago |
 Vst Towy Services Station (SA31 2BN)24hTowy Service Station, The Bridge, Caerfyrddin, SA31 2BN, Caerfyrddin | 0.3 miles | £7.77170.9p | £8.81193.9p | £8.63189.9p | ---- | 10h ago |
 Carmarthen Extra - Petrol Filling Station (SA31 3AX)24hTesco Stores, Lon Morfa, Caerfyrddin | 0.5 miles | £7.77170.9p | £8.81193.9p | £8.22180.9p | ---- | 10h ago |
 Ascona Tenby Road Service Station (SA33 5DT)24hLysonnen Road, Carmarthen, Carmarthen, Carmarthenshire | 3.1 miles | £7.81171.9p | £9.09199.9p | £9.09199.9p | £10.00219.9p | 10h ago |
 Asda White Mill Express Petrol (SA32 7EN)A40, Carmarthen, Carmarthen | 3.3 miles | £7.95174.9p | £8.86194.9p | ---- | ---- | 10h ago |
The market shown is a fixed 5-mile radius from the centre of the SA31 postcode district. Not every station reports every fuel grade, so grade averages state how many stations they cover. Prices are supplied through the official UK Government fuel price open data scheme (Open Government Licence v3.0) and checked every 30 minutes.
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Answers come straight from recorded official price data, refreshed every 30 minutes.
By fuel grade near SA31
Worth the drive?
Filling 50 litres at the cheapest reported station rather than an average-priced one saves about £1.75 today.
Questions about fuel prices near SA31
- Where is the cheapest petrol near SA31?
- The cheapest reported unleaded petrol (E10) within 5 miles of the centre of SA31 is 166.9p per litre at Murco, Derwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen (SA33 6TP). The local average is 170.4p across 10 forecourts reporting this grade. Prices were last refreshed at 4:02am on 20 September 2026 from official UK Government fuel price data.
- Where is the cheapest diesel near SA31?
- The cheapest reported diesel (B7) within 5 miles of the centre of SA31 is 191.9p per litre at Oil 4 Wales Ltd, Nantycaws Filling Station Ltd, Llanddarog Road, Caerfyrddin, SA32 8BG, Caerfyrddin (SA32 8BG). The local average is 194.1p per litre.
- How often are fuel prices in SA31 updated?
- Prices are supplied by fuel retailers through the official UK Government fuel price open data scheme and checked every 30 minutes. Each station row shows when its price was last recorded.