Fuel Price Check Analysis – Week of March 31, 2026 Petrol (E10) 155.7p 2.5% (+3.8p) 7d avg: 154.2p Slight rise | Super Unleaded (E5) 173.1p 2.5% (+4.2p) 7d avg: 171.5p Hold off if you can | Diesel (B7) 187.4p 3.4% (+6.1p) 7d avg: 185p Hold off if you can | Super Diesel (SDV) 205.2p 2.9% (+5.8p) 7d avg: 202.7p Hold off if you can |
Fuel Price Check Analysis – Week of March 31, 2026 Petrol (E10) 155.7p 2.5% (+3.8p) 7d avg: 154.2p Slight rise | Super Unleaded (E5) 173.1p 2.5% (+4.2p) 7d avg: 171.5p Hold off if you can | Diesel (B7) 187.4p 3.4% (+6.1p) 7d avg: 185p Hold off if you can | Super Diesel (SDV) 205.2p 2.9% (+5.8p) 7d avg: 202.7p Hold off if you can |

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

A comprehensive breakdown of fuel prices in the Castle Douglas 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 Sunday, 5th April 2026 at 13:15
2
Local Stations
21
Brands (DG Area)
19.0p
Max Price Gap
#64
UK Ranking REGION
Key Takeaways
  • Cheapest petrol: 137.9p at St Johns Town Services
  • Potential savings: Up to £10.45 per tank
  • 34 stations tracked across 21 brands

Motorists in Castle Douglas are currently paying above-average prices compared to other UK regions. Over the past week, E10 petrol prices in DG have Increased 4.2p (2.8%)

According to our latest data feed from the Competition and Markets Authority (CMA), selecting the right forecourt in Castle Douglas could save you up to 19.0p per litre. For an average 55-litre family car, that's a saving of over £10.45 on a single tank.

Market Competition: Moderate competition

Competition Level: High

Castle Douglas has 34 active fuel stations across 21 different brands, with a brand diversity index of 0.62 - indicating healthy market competition.

The price spread between cheapest and average stations is 25.1p, revealing significant price differences - shop around to save!

Today's Best Value

Cheapest E10 Petrol in Castle Douglas, Castle Douglas:
137.9p at St Johns Town Services, 4, AYR ROAD, DALRY, CASTLE DOUGLAS, DG7 3SW, CASTLE DOUGLAS, Scotland

Cheapest B7 Diesel in Castle Douglas, Castle Douglas:
173.9p at St Johns Town Services, 4, AYR ROAD, DALRY, CASTLE DOUGLAS, DG7 3SW, CASTLE DOUGLAS, Scotland

Surprisingly, an independent or branded station (St Johns Town Services) has beaten the supermarkets to the top spot today.

Fuel Type Availability

E10
Unleaded (E10)
Widely available
30 / 34 Stations (88.2%)
E5
Super Unleaded (E5)
Moderate availability
22 / 34 Stations (64.7%)
B7
Diesel (B7)
Widely available
33 / 34 Stations (97.1%)
SDV
Premium Diesel
Moderate availability
13 / 34 Stations (38.2%)

Top 2 cheapest petrol stations (E10)

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

PETROL LEADERBOARD Live Data
1
St Johns Town Services
4, AYR ROAD, DALRY, CASTLE DOUGLAS, DG7 3SW, CASTLE DOUGLAS, Scotland , DG7 3SW
137.9p
BEST PRICE
2
JET
CROWN FILLING STATION, —, QUEEN ST, CASTLE DOUGLAS, UNITED KINGDOM , DG7 1HX
156.9p
+19.0p

Top 2 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 Castle Douglas area.

DIESEL LEADERBOARD Live Data
1
St Johns Town Services
4, AYR ROAD, DALRY, CASTLE DOUGLAS, DG7 3SW, CASTLE DOUGLAS, Scotland , DG7 3SW
173.9p
BEST PRICE
2
JET
CROWN FILLING STATION, —, QUEEN ST, CASTLE DOUGLAS, UNITED KINGDOM , DG7 1HX
187.9p
+14.0p

How to save on fuel in Castle Douglas

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 Castle Douglas.

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

"Castle Douglas benefits from strong market competition with 21 brands operating across 34 stations. Prices have climbed 4.2p this week, so filling up sooner rather than later is advisable, while with a 25.1p price gap between cheapest and average stations, careful selection could save £13.81 per tank."

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

Frequently Asked Questions

As of April 5, 2026, the cheapest station is St Johns Town Services at 137.9p per litre.

There is currently a 19.0p difference between the cheapest and most expensive stations in Castle Douglas. For a standard family car, this equals a saving of £10.45 per tank.

Not currently. An independent or oil-company brand (St Johns Town Services) 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: 13:49, 05 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 Castle Douglas was last synchronized at 13:15 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) 4.2p
Was: 151.8p → Now: 156p
Diesel (B7) 6.4p
Was: 180.9p → Now: 187.3p

Visualise the Savings

View 4 local stations on our interactive map.

Open Live Map
Popular Brands in Castle Douglas
St Johns Town Services JET