Cheapest fuel in Merthyr Tydfil
We hold recently reported prices for 4 forecourts in Merthyr Tydfil. Every price below carries the date the retailer reported it, so you can see how recent it is before you drive.
Cheapest by fuel type
The lowest reported price for each fuel across Merthyr Tydfil, and where it was reported.
E10 — standard petrol
Unleaded
173.9p
Treharris Service StationCF46 5EY
Price from 18 Oct 2026E5 — premium petrol
Super unleaded
196.9p
Rontec DowlaisCF48 3DA
Price from 18 Oct 2026B7 — standard diesel
Diesel
198.9p
Asda Merthyr Tydfil SuperstoreCF48 2YF
Price from 18 Oct 2026V-Power / Ultimate
Premium diesel
217.9p
Treharris Service StationCF46 5EY
Price from 18 Oct 2026Is fuel dear in Merthyr Tydfil?
The Merthyr Tydfil figure is the average of the forecourts listed on this page. The UK figure is national — it is not limited to Merthyr Tydfil — and it is taken over the 6,155 forecourts that reported a price in the most recent GOV.UK snapshot, out of the 8,136 forecourts we currently list. That is what it was calculated from, rather than every forecourt in the country.
| Fuel | Merthyr Tydfil avg | UK avg | Difference |
|---|---|---|---|
| Unleaded4 forecourts | 176.4p | 174.0p | 2.4p dearer |
| Super unleaded2 forecourts | 197.4p | 192.3p | 5.1p dearer |
| Diesel4 forecourts | 200.4p | 199.0p | 1.4p dearer |
| Premium diesel2 forecourts | 218.4p | 218.8p | 0.4p cheaper |
Within Merthyr Tydfil, premium diesel runs from 217.9p at Treharris Service Station to 218.9p at Rontec Dowlais — about £0.50 on a 50-litre fill, if both prices still stand.
Merthyr Tydfil forecourts, cheapest premium diesel first
2 of 4 Merthyr Tydfil forecourts report premium diesel. The figure under each price is the difference from the UK average of 218.8p.
Treharris Service Station
BrandedCARDIFF ROAD, QUAKERS YARD, TREHARRIS, MERTHYR TYDFILCF46 5EY
217.9p
-0.9p vs UK
Rontec Dowlais
BrandedNEW ROAD, MERTHYR TYDFIL, MID GLAMORGANCF48 3DA
218.9p
+0.1p vs UKWhere these prices come from
Prices are published by the retailers themselves under the government's fuel price transparency scheme and are shown in pence per litre. A forecourt only appears here once it has actually reported, and we show its reported date rather than assuming today's price. Prices can change between a retailer reporting and you arriving, so always check the pump.
Common questions about fuel in Merthyr Tydfil
Every answer below is worked out from the forecourt prices on this page.
Where is the cheapest premium diesel in Merthyr Tydfil?
Treharris Service Station, CF46 5EY, at 217.9p a litre. That is the lowest premium diesel price of the 2 Merthyr Tydfil forecourts reporting it. The retailer reported it today (18 Oct 2026). Prices can change between a retailer reporting and you arriving, so check the pump.
How many petrol stations in Merthyr Tydfil report their fuel prices?
We hold a recently reported price for 4 forecourts in Merthyr Tydfil, published by the retailers themselves under the government's fuel price transparency scheme. That is what has reported recently enough for us to list, rather than a count of every forecourt in Merthyr Tydfil — a site that stops reporting drops out, and one that has never reported never appears. Not every forecourt sells every fuel: 4 quote unleaded, 2 quote super unleaded, 4 quote diesel, 2 quote premium diesel. All 2 of the forecourts quoting premium diesel are ranked on this page.
Is premium diesel cheaper in Merthyr Tydfil than the UK average?
Merthyr Tydfil averages 218.4p for premium diesel across the 2 forecourts quoting it, which is 0.4p a litre cheaper than the UK average of 218.8p. The UK figure is taken over the 6,155 forecourts that reported a price in the most recent GOV.UK snapshot, out of the 8,136 forecourts we currently list, so it is not limited to Merthyr Tydfil.
How up to date are these Merthyr Tydfil fuel prices?
Every price on this page was reported today. Retailers report into the scheme themselves, anywhere from daily to occasionally, so no price here is a live pump price — each one is shown with the date it was reported.
How much can I save by shopping around for premium diesel in Merthyr Tydfil?
Premium diesel runs from 217.9p to 218.9p across the 2 Merthyr Tydfil forecourts quoting it — a gap of 1.0p a litre, or about £0.50 on a 50-litre fill, if both prices still stand when you get there.
Fuel prices near Merthyr Tydfil
The nearest towns to Merthyr Tydfil with at least 5 reporting forecourts, up to 50 miles away. Distances are straight-line, from the middle of the Merthyr Tydfil forecourts listed above to that town's nearest one.
Fuel prices in Caerphilly
6 forecourts · about 8.7 miles away
Fuel prices in Pontypridd
5 forecourts · about 11 miles away
Fuel prices in Neath
8 forecourts · about 12 miles away
Fuel prices in Cardiff
29 forecourts · about 14 miles away
Fuel prices in Newport
24 forecourts · about 14 miles away
Fuel prices in Bridgend
16 forecourts · about 17 miles away
Fuel prices in Swansea
26 forecourts · about 17 miles away
Fuel prices in Hereford
17 forecourts · about 21 miles away
Garages near Merthyr Tydfil
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