Weekly fuel price report - week 40, 2026
UK fuel prices: 28 September - 4 October 2026
Average UK forecourt prices for the week, calculated by Pennyfill from the UK Government's Fuel Finder open data.
The week in numbers
Unleaded (E10) averaged 174.6p a litre across the UK, up 1.0p on the previous week (173.6p).
Diesel (B7) averaged 199.8p a litre across the UK, up 1.5p on the previous week (198.3p).
Super unleaded (E5) averaged 192.3p a litre across the UK, up 2.0p on the previous week (190.3p).
Premium diesel averaged 218.6p a litre across the UK, up 1.9p on the previous week (216.7p).
Diesel averaged 25.2p a litre more than unleaded.
Average prices vs the previous week
| Fuel | Week average | Previous week | Change | Cheapest day | Lowest station price |
|---|---|---|---|---|---|
| Unleaded (E10) | 174.6p | 173.6p | +1.0p | Monday 28 September (174.3p) | 157.9p |
| Diesel (B7) | 199.8p | 198.3p | +1.5p | Monday 28 September (199.5p) | 181.9p |
| Super unleaded (E5) | 192.3p | 190.3p | +2.0p | Monday 28 September (192.0p) | 167.9p |
| Premium diesel | 218.6p | 216.7p | +1.9p | Monday 28 September (218.3p) | 190.9p |
Supermarkets vs other forecourts
| Fuel | Supermarkets | Other forecourts | Gap |
|---|---|---|---|
| Unleaded (E10) | 173.0p | 175.0p | 2.0p cheaper at supermarkets |
| Diesel (B7) | 197.6p | 200.4p | 2.8p cheaper at supermarkets |
| Super unleaded (E5) | 186.3p | 193.7p | 7.4p cheaper at supermarkets |
| Premium diesel | 211.4p | 218.8p | 7.4p cheaper at supermarkets |
Day by day
Over the week, the UK average for unleaded went from 174.3p on Monday to 174.8p on Sunday, up 0.5p.
The cheapest day for unleaded nationally was Monday 28 September 2026, at 174.3p on average.
The lowest unleaded price at any UK station during the week was 157.9p a litre.
Supermarket forecourts averaged 2.0p a litre less than other forecourts for unleaded (173.0p against 175.0p).
Over the week, the UK average for diesel went from 199.5p on Monday to 200.0p on Sunday, up 0.5p.
The cheapest day for diesel nationally was Monday 28 September 2026, at 199.5p on average.
The lowest diesel price at any UK station during the week was 181.9p a litre.
Supermarket forecourts averaged 2.8p a litre less than other forecourts for diesel (197.6p against 200.4p).
Other weeks
- 2 - 8 November 2026
- 26 October - 1 November 2026
- 19 - 25 October 2026
- 12 - 18 October 2026
- 5 - 11 October 2026
- 21 - 27 September 2026
For today's prices see the UK Fuel Price Index. Pennyfill is independent and not affiliated with the UK Government.