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
Wednesday
163.99p
Based on 6,789 price records
Worst Day
Most expensive average
Sunday
167.70p
Based on 3,119 price records
Potential Savings
By choosing the right day
3.71p/L
~£1.86 per 50L tank
~£97 per year (weekly fills)
Average Petrol (E10) Price by Day
Based on 30-day rolling average from 14 September 2026
All Days Comparison
Ranked by average Petrol (E10) price
#1Wednesday
163.99p6,789 samplesBest
#2Tuesday
164.70p6,170 samples+0.71p
#3Monday
166.02p6,412 samples+2.03p
#4Saturday
166.02p4,427 samples+2.03p
#5Thursday
166.22p8,168 samples+2.23p
#6Friday
166.22p9,276 samples+2.23p
#7Sunday
167.70p3,119 samples+3.71p
| Rank | Day | Avg Price | Difference | Sample Size |
|---|---|---|---|---|
| #1 | Wednesday | 163.99p | Best | 6,789 |
| #2 | Tuesday | 164.70p | +0.71p | 6,170 |
| #3 | Monday | 166.02p | +2.03p | 6,412 |
| #4 | Saturday | 166.02p | +2.03p | 4,427 |
| #5 | Thursday | 166.22p | +2.23p | 8,168 |
| #6 | Friday | 166.22p | +2.23p | 9,276 |
| #7 | Sunday | 167.70p | +3.71p | 3,119 |
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.