Today’s Cheapest Petrol and Diesel in Carmarthen town centre: The Full Report

A comprehensive breakdown of fuel prices in the Carmarthen town centre area. We analyze the market data to help you save on your next fill-up.

Jonathan Mathews
Jonathan Mathews
Automotive Data Analyst
10+ years automotive industry
Last Updated Friday, 6th February 2026 at 02:50
3
Local Stations
44
Brands (SA Area)
0.0p
Max Price Gap
#2
UK Ranking REGION
Key Takeaways
  • Cheapest petrol: 125.9p at Morrisons
  • Potential savings: Up to £0.00 per tank
  • 111 stations tracked across 44 brands
  • Prices have decreased 0.8p this week

Motorists in Carmarthen town centre are currently enjoying some of the lowest fuel prices in the UK, ranking in the top 2% nationally. Over the past week, E10 petrol prices in SA have Decreased 0.8p (0.6%)

According to our latest data feed from the Competition and Markets Authority (CMA), selecting the right forecourt in Carmarthen town centre could save you up to 0.0p per litre. For an average 55-litre family car, that's a saving of over £0.00 on a single tank.

Market Competition: Moderate competition

Competition Level: High

Carmarthen town centre has 111 active fuel stations across 44 different brands, with a brand diversity index of 0.40 - indicating healthy market competition.

The price spread between cheapest and average stations is 6.9p, revealing significant price differences - shop around to save!

Today's Best Value

Cheapest E10 Petrol in Carmarthen, Carmarthen town centre:
125.9p at Morrisons, MFG Morrisons Carmarthen, Parc Pensarn, CARMARTHEN

Cheapest B7 Diesel in Carmarthen, Carmarthen town centre:
135.9p at MURCO, TANERDY GARAGE, TANERDY , CARMARTHEN

As expected, the supermarket chains are leading the price war in Carmarthen town centre, aggressively undercutting the major oil brands.

Fuel Type Availability

E10
Unleaded (E10)
Widely available
97 / 111 Stations (87.4%)
E5
Super Unleaded (E5)
Moderate availability
60 / 111 Stations (54.1%)
B7
Diesel (B7)
Widely available
96 / 111 Stations (86.5%)
SDV
Premium Diesel
Limited availability
27 / 111 Stations (24.3%)

Top 3 cheapest petrol stations (E10)

Here is the verified list of the most affordable places to buy standard Unleaded petrol in Carmarthen town centre today.

PETROL LEADERBOARD Live Data
1
Morrisons
MFG Morrisons Carmarthen, Parc Pensarn, CARMARTHEN , SA31 2NF
125.9p
BEST PRICE
2
TESCO
Tesco Stores Morfa Lane Carmarthen , SA31 3AX
125.9p
+0.0p
3
MURCO
TANERDY GARAGE, TANERDY , CARMARTHEN , SA31 2EY
125.9p
+0.0p

Top 3 cheapest diesel stations (B7)

For diesel drivers, the price variance can often be even higher. The following stations are currently offering the best value for B7 Diesel in the Carmarthen town centre area.

DIESEL LEADERBOARD Live Data
1
MURCO
TANERDY GARAGE, TANERDY , CARMARTHEN , SA31 2EY
135.9p
BEST PRICE
2
Morrisons
MFG Morrisons Carmarthen, Parc Pensarn, CARMARTHEN , SA31 2NF
136.9p
+1.0p
3
TESCO
Tesco Stores Morfa Lane Carmarthen , SA31 3AX
136.9p
+1.0p

How to save on fuel in Carmarthen town centre

While choosing the cheapest station is the easiest way to save, changing your driving habits can also make a significant difference to your monthly spend.

Drive Smoothly

Aggressive acceleration and heavy braking can increase fuel consumption by up to 40% in stop-and-go traffic around Carmarthen town centre.

Reduce Weight

Carrying an extra 50kg in your boot increases fuel consumption by 1-2%. Clear out unnecessary items.

Market Analyst Commentary
CFP Research Team

"Carmarthen town centre benefits from strong market competition with 44 brands operating across 111 stations. Ranking in the top 2% nationally makes this an excellent area for fuel savings, while with a 6.9p price gap between cheapest and average stations, careful selection could save £3.80 per tank."

For more detailed savings, explore our Interactive Fuel Map to scan the entire region visually.

Frequently Asked Questions

As of February 6, 2026, the cheapest station is Morrisons at 125.9p per litre.

There is currently a 0.0p difference between the cheapest and most expensive stations in Carmarthen town centre. For a standard family car, this equals a saving of £0.00 per tank.

Yes, currently supermarkets (Morrisons) are offering the lowest prices in the area.

Our Analysis Methodology

Data Collection
  • Direct feed from UK Government CMA API
  • Updated every 30 minutes via automated polling
  • Zero user-submitted prices (prevents manipulation)
  • Last sync: 03:08, 06 Feb 2026
Quality Assurance
  • Automated anomaly detection for pricing errors
  • Cross-referenced against regional averages
  • Outliers flagged for manual review
  • Historical data tracked for trend validation
Verified Data Source: All prices displayed on this page are sourced directly from the Competition and Markets Authority's official fuel price transparency scheme. We do not accept payments from retailers to alter rankings or display preferential pricing.
Data Accuracy & Methodology

Source: We retrieve real-time pricing data directly from the UK Government CMA Open Data Scheme.

Frequency: Data for Carmarthen town centre was last synchronized at 02:50 today. We update our database every 4 hours to ensure accuracy.

Disclaimer: While we strive for 100% accuracy, forecourt prices can change instantly. The prices listed above were correct at the time of our last server sync.

Editorial Policy

CheckFuelPrices is independent. We do not accept payment from fuel brands to alter rankings. Read our full policy.

📈 7-Day Price Movement
Petrol (E10) 0.8p
Was: 129.3p → Now: 128.5p
Diesel (B7) 0.9p
Was: 138.6p → Now: 137.7p

Visualise the Savings

View 6 local stations on our interactive map.

Open Live Map
Popular Brands in Carmarthen town centre
Morrisons TESCO MURCO