Fuel Price Check Analysis – Week of March 31, 2026 Petrol (E10) 153.4p 2.5% (+3.8p) 7d avg: 151.3p Hold off if you can | Super Unleaded (E5) 170.1p 2.3% (+3.8p) 7d avg: 168.3p Hold off if you can | Diesel (B7) 183.9p 4% (+7p) 7d avg: 180.2p Hold off if you can | Super Diesel (SDV) 200.7p 2.2% (+4.3p) 7d avg: 198.7p Hold off if you can |
Fuel Price Check Analysis – Week of March 31, 2026 Petrol (E10) 153.4p 2.5% (+3.8p) 7d avg: 151.3p Hold off if you can | Super Unleaded (E5) 170.1p 2.3% (+3.8p) 7d avg: 168.3p Hold off if you can | Diesel (B7) 183.9p 4% (+7p) 7d avg: 180.2p Hold off if you can | Super Diesel (SDV) 200.7p 2.2% (+4.3p) 7d avg: 198.7p Hold off if you can |

Today’s Cheapest Petrol and Diesel in Cardiff: The Full Report

A comprehensive breakdown of fuel prices in the Cardiff 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 Wednesday, 1st April 2026 at 15:55
19
Local Stations
26
Brands (CF Area)
7.2p
Max Price Gap
#26
UK Ranking REGION
Key Takeaways
  • Cheapest petrol: 150.7p at ASDA
  • Potential savings: Up to £3.96 per tank
  • 100 stations tracked across 26 brands

Motorists in Cardiff are currently enjoying some of the lowest fuel prices in the UK, ranking in the top 22% nationally. Over the past week, E10 petrol prices in CF have Increased 4.3p (2.9%)

According to our latest data feed from the Competition and Markets Authority (CMA), selecting the right forecourt in Cardiff could save you up to 7.2p per litre. For an average 55-litre family car, that's a saving of over £3.96 on a single tank.

Market Competition: Moderate competition

Competition Level: High

Cardiff has 100 active fuel stations across 26 different brands, with a brand diversity index of 0.26 - indicating healthy market competition.

The price spread between cheapest and average stations is 10.5p, revealing significant price differences - shop around to save!

Today's Best Value

Cheapest E10 Petrol in , Cardiff:
150.7p at ASDA, RIVERSIDE RETAIL PARK, ABERDARE, WALES

Cheapest B7 Diesel in , Cardiff:
178.7p at ASDA, RIVERSIDE RETAIL PARK, ABERDARE, WALES

Surprisingly, an independent or branded station (ASDA) has beaten the supermarkets to the top spot today.

Fuel Type Availability

E10
Unleaded (E10)
Widely available
99 / 100 Stations (99%)
E5
Super Unleaded (E5)
Moderate availability
70 / 100 Stations (70%)
B7
Diesel (B7)
Widely available
99 / 100 Stations (99%)
SDV
Premium Diesel
Moderate availability
44 / 100 Stations (44%)

Top 10 cheapest petrol stations (E10)

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

PETROL LEADERBOARD Live Data
1
ASDA
RIVERSIDE RETAIL PARK, ABERDARE, WALES , CF44 0AH
150.7p
BEST PRICE
2
ESSAR
MORRIS TERRICE, NORTH ROAD, FERNDALE, WALES , CF43 4ST
151.2p
+0.5p
3
TESCO
DEPOT ROAD, ABERDARE, WALES , CF44 8DL
151.9p
+1.2p
4
VALERO PENTRE
LLEWELYN STREET, TREORCHY, RHONDDA CYNON TAF, WALES , CF41 7BW
151.9p
+1.2p
5
GULF
CARDIFF ROAD, QUAKERS YARD, TREHARRIS, MERTHYR TYDFIL, WALES , CF46 5EY
151.9p
+1.2p
6
TEXACO
MABON ROAD, NELSON, MID GLAMORGAN, WALES , CF46 6PE
152.9p
+2.2p
7
ASDA
COLLIERS WAY,, TONYPANDY, WALES , CF40 2JQ
153.7p
+3.0p
8
TEXACO
YSTRAD ROAD, PENTRE, RHONDDA, WALES , CF41 7PN
153.9p
+3.2p
9
SHELL
TYLACELYN ROAD, TONYPANDY, MID GLAMORGAN, UNITED KINGDOM , CF40 1JR
153.9p
+3.2p
10
TEXACO
A470 (NORTHBOUND), ABERCYNON, MID GLAMORGAN, WALES , CF45 4YX
154.9p
+4.2p

Top 10 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 Cardiff area.

DIESEL LEADERBOARD Live Data
1
ASDA
RIVERSIDE RETAIL PARK, ABERDARE, WALES , CF44 0AH
178.7p
BEST PRICE
2
TESCO
DEPOT ROAD, ABERDARE, WALES , CF44 8DL
179.9p
+1.2p
3
VALERO PENTRE
LLEWELYN STREET, TREORCHY, RHONDDA CYNON TAF, WALES , CF41 7BW
181.9p
+3.2p
4
ESSAR
MORRIS TERRICE, NORTH ROAD, FERNDALE, WALES , CF43 4ST
183.2p
+4.5p
5
ASDA
DOWLAIS TOP, MERTHYR TYDFIL, WALES , CF48 2YF
183.7p
+5.0p
6
SHELL
TYLACELYN ROAD, TONYPANDY, MID GLAMORGAN, UNITED KINGDOM , CF40 1JR
183.9p
+5.2p
7
EG ON THE MOVE
3 - 3A LOWER HIGH STREET, MERTHYR TYDFIL, GLAMORGAN, UNITED KINGDOM , CF47 8EB
183.9p
+5.2p
8
GULF
CARDIFF ROAD, QUAKERS YARD, TREHARRIS, MERTHYR TYDFIL, WALES , CF46 5EY
184.9p
+6.2p
9
ASDA
COLLIERS WAY,, TONYPANDY, WALES , CF40 2JQ
185.7p
+7.0p
10
TEXACO
MABON ROAD, NELSON, MID GLAMORGAN, WALES , CF46 6PE
185.9p
+7.2p

How to save on fuel in Cardiff

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 Cardiff.

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

"Cardiff benefits from strong market competition with 26 brands operating across 100 stations. Prices have climbed 4.3p this week, so filling up sooner rather than later is advisable, while ranking in the top 22% nationally makes this an excellent area for fuel savings."

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

Frequently Asked Questions

As of April 1, 2026, the cheapest station is ASDA at 150.7p per litre.

There is currently a 7.2p difference between the cheapest and most expensive stations in Cardiff. For a standard family car, this equals a saving of £3.96 per tank.

Not currently. An independent or oil-company brand (ASDA) is actually cheaper than the local supermarkets today.

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: 15:56, 01 Apr 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 Cardiff was last synchronized at 15:55 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) 4.3p
Was: 148.1p → Now: 152.4p
Diesel (B7) 8.9p
Was: 174.1p → Now: 183p

Visualise the Savings

View 20 local stations on our interactive map.

Open Live Map
Popular Brands in Cardiff
ASDA ESSAR TESCO VALERO PENTRE GULF