Fuel prices
Petrol and diesel prices in Merthyr Tydfil
Average pump prices across 5 filling stations in Merthyr Tydfil, from the prices every UK forecourt must now publish under the government’s Fuel Finder scheme. Checked 16 Sept, 16:47.
- Average unleaded petrol 173.7p 2.0p above the UK average
- Average diesel 198.5p 3.9p above the UK average
- Cheapest petrol 172.9p Asda Merthyr Tydfil Superstore
- Filling stations 5 1 at supermarkets
Unleaded petrol averages 173.7p a litre across 5 forecourts in Merthyr Tydfil, 2.0p above the UK average. Diesel averages 198.5p, 3.9p above the UK average. The cheapest petrol is at Asda Merthyr Tydfil Superstore, 172.9p; the dearest is 174.9p. The cheapest diesel is there too, 197.9p.
Cheapest petrol and diesel in Merthyr Tydfil
| Filling station | Price |
|---|---|
 Asda Merthyr Tydfil Superstore Merthyr Tydfil | 172.9p |
 Esso Rontec Dowlais Merthyr Tydfil | 172.9p |
| EG Merthyr Tydfil Merthyr Tydfil | 173.9p |
 Gulf Treharris Service Station Treharris | 173.9p |
 Texaco Valley Heights Service Station Merthyr Tudful | 174.9p |
| Filling station | Price |
|---|---|
| Asda Merthyr Tydfil Superstore Merthyr Tydfil | 197.9p |
| Esso Rontec Dowlais Merthyr Tydfil | 197.9p |
| Gulf Treharris Service Station Treharris | 197.9p |
| EG Merthyr Tydfil Merthyr Tydfil | 198.9p |
| Texaco Valley Heights Service Station Merthyr Tudful | 199.9p |
Get the cheapest fuel in Merthyr Tydfil every Saturday
A free weekly email with the cheapest petrol and diesel within 5 miles of your postcode.
Council areas in Wales, cheapest first
Merthyr Tydfil is number 18 of 22 for petrol.
| Area | Petrol | Diesel |
|---|---|---|
| Pembrokeshire | 168.0p | 191.5p |
| Torfaen | 168.7p | 191.0p |
| Caerphilly | 168.8p | 191.7p |
| Ceredigion | 169.3p | 193.7p |
| Neath Port Talbot | 169.3p | 192.7p |
| Vale of Glamorgan | 169.4p | 193.9p |
| Carmarthenshire | 169.5p | 192.3p |
| Bridgend | 169.8p | 193.1p |
| Rhondda Cynon Taf | 170.1p | 193.2p |
| Isle of Anglesey | 170.2p | 194.7p |
| Blaenau Gwent | 170.2p | 191.4p |
| Powys | 170.9p | 194.9p |
| Wrexham | 171.3p | 193.0p |
| Cardiff | 171.3p | 194.3p |
| Gwynedd | 171.4p | 195.3p |
| Newport | 171.4p | 194.4p |
| Swansea | 172.6p | 195.1p |
| Merthyr Tydfil | 173.7p | 198.5p |
| Monmouthshire | 173.8p | 196.3p |
| Flintshire | 174.3p | 195.1p |
| Denbighshire | 174.6p | 195.4p |
| Conwy | 175.4p | 196.7p |
Every filling station in Merthyr Tydfil
| Filling station | Petrol | Diesel |
|---|---|---|
| Asda Merthyr Tydfil Superstore Merthyr Tydfil · supermarket | 172.9p | 197.9p |
| Esso Rontec Dowlais Merthyr Tydfil | 172.9p | 197.9p |
| EG Merthyr Tydfil Merthyr Tydfil | 173.9p | 198.9p |
| Gulf Treharris Service Station Treharris | 173.9p | 197.9p |
| Texaco Valley Heights Service Station Merthyr Tudful | 174.9p | 199.9p |
A dash means no current price: none reported, not changed for over two weeks, or not believable.
Data sources and methodology
| Figures | Source | Period | Records | Updated |
|---|---|---|---|---|
| Forecourt prices | Fuel Finder open data Fuel Finder statutory scheme ONS Postcode Directory Office for National Statistics | Prices at 16:47 on 16 September 2026 | 8,070 filling stations | 16 September 2026 |
- Averages use unleaded (E10) and standard diesel (B7) prices at open forecourts, leaving out prices unchanged for over two weeks or far from every other forecourt. They count each forecourt once, not by how much fuel it sells.
- Forecourts are placed in council areas from their postcode, using the ONS Postcode Directory.
Source: Fuel Finder, the UK government’s statutory fuel price scheme.
Source: Office for National Statistics licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026.