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
Monday
157.34p
Based on 3,587 price records
Worst Day
Most expensive average
Tuesday
159.05p
Based on 4,211 price records
Potential Savings
By choosing the right day
1.71p/L
~£0.86 per 50L tank
~£45 per year (weekly fills)
Average Petrol (E10) Price by Day
Based on 30-day rolling average from 15 May 2026
All Days Comparison
Ranked by average Petrol (E10) price
#1Monday
157.34p3,587 samplesBest
#2Sunday
157.90p872 samples+0.56p
#3Saturday
158.08p1,870 samples+0.74p
#4Thursday
158.45p5,424 samples+1.11p
#5Wednesday
158.69p4,635 samples+1.35p
#6Friday
158.83p4,673 samples+1.49p
#7Tuesday
159.05p4,211 samples+1.71p
| Rank | Day | Avg Price | Difference | Sample Size |
|---|---|---|---|---|
| #1 | Monday | 157.34p | Best | 3,587 |
| #2 | Sunday | 157.90p | +0.56p | 872 |
| #3 | Saturday | 158.08p | +0.74p | 1,870 |
| #4 | Thursday | 158.45p | +1.11p | 5,424 |
| #5 | Wednesday | 158.69p | +1.35p | 4,635 |
| #6 | Friday | 158.83p | +1.49p | 4,673 |
| #7 | Tuesday | 159.05p | +1.71p | 4,211 |
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.