Best Day to Buy Petrol in the UK
Data-driven analysis of fuel prices by day of the week. Find out when fuel is cheapest and save money on your fill-ups.
Best Day
Cheapest average price
Thursday
156.95p
Based on 7,491 price records
Worst Day
Most expensive average
Sunday
158.88p
Based on 2,017 price records
Potential Savings
By choosing the right day
1.93p/L
~£0.97 per 50L tank
~£50 per year (weekly fills)
Average Petrol (E10) Price by Day
Based on 30-day rolling average from 1 May 2026
All Days Comparison
Ranked by average Petrol (E10) price
#1Thursday
156.95p7,491 samplesBest
#2Wednesday
156.99p7,842 samples+0.04p
#3Friday
157.30p5,693 samples+0.35p
#4Monday
157.61p4,490 samples+0.66p
#5Saturday
157.81p3,302 samples+0.85p
#6Tuesday
158.28p5,246 samples+1.33p
#7Sunday
158.88p2,017 samples+1.93p
| Rank | Day | Avg Price | Difference | Sample Size |
|---|---|---|---|---|
| #1 | Thursday | 156.95p | Best | 7,491 |
| #2 | Wednesday | 156.99p | +0.04p | 7,842 |
| #3 | Friday | 157.30p | +0.35p | 5,693 |
| #4 | Monday | 157.61p | +0.66p | 4,490 |
| #5 | Saturday | 157.81p | +0.85p | 3,302 |
| #6 | Tuesday | 158.28p | +1.33p | 5,246 |
| #7 | Sunday | 158.88p | +1.93p | 2,017 |
How We Calculate This
This analysis is based on real fuel price data collected from over 5,000 UK petrol stations. We calculate the average price for each day of the week using a rolling 30-day window, updated daily.
The data shows that prices tend to vary slightly by day of the week, though the differences may be small. Factors that affect fuel prices include:
- Wholesale oil prices
- Competition between nearby stations
- Location (motorway vs supermarket)
- Supply and demand patterns
While choosing the right day can help save money, the biggest savings typically come from comparing prices between stations in your area.