Petrol Stations in Carmarthenshire
Compare live petrol and diesel prices at 2 petrol stations in Carmarthenshire. Cheapest fuel near you, updated every 5 minutes.
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Avg Unleaded
159.4p
Avg Diesel
184.9p
Cheapest Unleaded
158.9p
Cheapest Diesel
182.9p
-Carmarthenshire unleaded is currently 159.4p — 0.9p above the UK national average of 158.5p
Nearest Alternatives
Other stations within 15 miles. Is the drive worth it?
Llandeilo Service Station
LLANDEILO · SA19 6LU · 12.6 miles away
161.9p
petrol
189.9p
diesel
ASCONA MANORDEILO SERVICE STATION
LLANDEILO · SA19 7BN · 9.9 miles away
159.9p
petrol
189.9p
diesel
Morris Isaacs
LLANDOVERY · SA20 0EG · 9.5 miles away
164.9p
petrol
181.9p
diesel
THAARA SERVICE STATION
LLANBEDR PONT STEFFAN · SA48 7JR · 6.3 miles away
157.9p
petrol
184.9p
diesel
J Morgan and Son
LLANBEDR PONT STEFFAN · SA48 7JL · 5.1 miles away
158.9p
petrol
185.9p
diesel
D D Evans & Sons Ltd, Service Garage
LAMPETER · SA48 7JA · 5.1 miles away
159.9p
petrol
186.9p
diesel
Fuel cost assumes 40 mpg round trip at the alternative station's price.
All Stations in Carmarthenshire
Guide to Fuel Prices in Carmarthenshire
Carmarthenshire has 2 petrol stationsreporting live prices through the UK government's mandatory fuel price transparency scheme. Average unleaded (E10) is currently 159.4p per litre, with diesel (B7) at 184.9p per litre. The cheapest unleaded right now is 158.9p at CHIVERS CORNER GARAGE (SA16 0BS).
All 2 stations in Carmarthenshireare branded retailers — there are no supermarket forecourts (Tesco, Asda, Morrisons, Sainsbury's, Costco) currently in our data for this area.
Within 30 miles of Carmarthenshire, no nearby towns currently have cheaper average unleaded prices than Carmarthenshire's 159.4p — you're in a competitive area. Closest comparable: Bishop'S Stortford (161.6p, 1.9 mi).
Across all UK cities tracked by PetrolFinder, Carmarthenshire unleaded is 0.9p above the national average of 158.5p — driven by the local mix of supermarket vs branded forecourts and competition between 1 fuel brand operating in the area. Use the route planner to find the cheapest stop on your journey, or browse the price heatmap to spot regional bargains.
Carmarthenshire Snapshot
Stations2
Avg Unleaded159.4p
Cheapest Unleaded158.9p
Avg Diesel184.9p
Cheapest Diesel182.9p
Brands1
Petrol & Diesel FAQs for Carmarthenshire
Where is the cheapest petrol in Carmarthenshire?
The cheapest unleaded (E10) petrol in Carmarthenshire is currently 158.9p per litre at CHIVERS CORNER GARAGE (SA16 0BS). The average across 2 stations in Carmarthenshire is 159.4p per litre. Prices update every 5 minutes from official UK government data.
Where is the cheapest diesel in Carmarthenshire?
The cheapest diesel in Carmarthenshire is currently 182.9p per litre, with an average of 184.9p across 2 stations. That's 1.6p below the UK national diesel average of 186.5p.
Are supermarket petrol stations cheaper in Carmarthenshire?
Carmarthenshire doesn't have any supermarket fuel forecourts in our data — all 2 stations are branded retailers.
Which towns near Carmarthenshire have cheaper petrol?
Within 30 miles of Carmarthenshire, no nearby towns currently have cheaper average unleaded prices than Carmarthenshire's 159.4p — you're in a competitive area.
How often are Carmarthenshire fuel prices updated?
Prices for the 2 petrol stations in Carmarthenshire are updated every 5 minutes using the UK Government Fuel Finder API under The Motor Fuel Price (Open Data) Regulations 2025. Retailers are legally required to report price changes within 30 minutes.