Today’s Cheapest Petrol and Diesel in Didcot, Blewbury, Harwell: The Full Report

A comprehensive breakdown of fuel prices in the Didcot, Blewbury, Harwell 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
4
Local Stations
29
Brands (OX Area)
3.0p
Max Price Gap
#47
UK Ranking REGION
Key Takeaways
  • Cheapest petrol: 130.9p at Sainsbury's
  • Potential savings: Up to £1.65 per tank
  • 71 stations tracked across 29 brands

Motorists in Didcot, Blewbury, Harwell are currently experiencing competitive fuel prices, with average costs below the national median. Over the past week, E10 petrol prices in OX have Increased 1p (0.8%)

According to our latest data feed from the Competition and Markets Authority (CMA), selecting the right forecourt in Didcot, Blewbury, Harwell could save you up to 3.0p per litre. For an average 55-litre family car, that's a saving of over £1.65 on a single tank.

Market Competition: Moderate competition

Competition Level: High

Didcot, Blewbury, Harwell has 71 active fuel stations across 29 different brands, with a brand diversity index of 0.41 - indicating healthy market competition.

The price spread between cheapest and average stations is 8.2p, revealing significant price differences - shop around to save!

Today's Best Value

Cheapest E10 Petrol in Didcot, Didcot, Blewbury, Harwell:
130.9p at Sainsbury's, Central Drive

Cheapest B7 Diesel in Didcot, Didcot, Blewbury, Harwell:
136.9p at Sainsbury's, Central Drive

As expected, the supermarket chains are leading the price war in Didcot, Blewbury, Harwell, aggressively undercutting the major oil brands.

Fuel Type Availability

E10
Unleaded (E10)
Widely available
62 / 71 Stations (87.3%)
E5
Super Unleaded (E5)
Moderate availability
47 / 71 Stations (66.2%)
B7
Diesel (B7)
Widely available
56 / 71 Stations (78.9%)
SDV
Premium Diesel
Moderate availability
27 / 71 Stations (38%)

Top 4 cheapest petrol stations (E10)

Here is the verified list of the most affordable places to buy standard Unleaded petrol in Didcot, Blewbury, Harwell today.

PETROL LEADERBOARD Live Data
1
Sainsbury's
Central Drive , OX11 7ND
130.9p
BEST PRICE
2
TESCO
Wallingford Rd North Moreton Didcot , OX11 9BZ
130.9p
+0.0p
3
Valero
52-60 Wantage Road, Didcot, Oxon , OX11 0BT
131.9p
+1.0p
4
Blewbury
BLEWBURY SERVICE STATION, LONDON ROAD, BLEWBURY, DIDCOT, OX11 9NU, DIDCOT, England , OX11 9NU
133.9p
+3.0p

Top 4 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 Didcot, Blewbury, Harwell area.

DIESEL LEADERBOARD Live Data
1
Sainsbury's
Central Drive , OX11 7ND
136.9p
BEST PRICE
2
TESCO
Wallingford Rd North Moreton Didcot , OX11 9BZ
136.9p
+0.0p
3
Valero
52-60 Wantage Road, Didcot, Oxon , OX11 0BT
137.9p
+1.0p
4
Blewbury
BLEWBURY SERVICE STATION, LONDON ROAD, BLEWBURY, DIDCOT, OX11 9NU, DIDCOT, England , OX11 9NU
143.9p
+7.0p

How to save on fuel in Didcot, Blewbury, Harwell

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 Didcot, Blewbury, Harwell.

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

"Didcot, Blewbury, Harwell benefits from strong market competition with 29 brands operating across 71 stations. With a 8.2p price gap between cheapest and average stations, careful selection could save £4.51 per tank, while supermarkets like Sainsbury's continue to undercut traditional forecourts."

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 Sainsbury's at 130.9p per litre.

There is currently a 3.0p difference between the cheapest and most expensive stations in Didcot, Blewbury, Harwell. For a standard family car, this equals a saving of £1.65 per tank.

Yes, currently supermarkets (Sainsbury's) 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 Didcot, Blewbury, Harwell 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) 1p
Was: 131.1p → Now: 132.1p
Diesel (B7) Stable
Was: 140.7p → Now: 140.9p

Visualise the Savings

View 8 local stations on our interactive map.

Open Live Map
Popular Brands in Didcot, Blewbury, Harwell
Sainsbury's TESCO Valero Blewbury