Live prices
Cheapest fuel on the M3
4 service stations on the M3 report through the official UK fuel price scheme, ranked cheapest unleaded first.
The cheapest reported unleaded on the M3 is £8.86 a gallon (194.9p per litre) at Winchester North Connect Mwsa near WINCHESTER. M3 services average £8.86 a gallon (194.9p), 23.8p above the national average of 171.1p: filling 50 litres off the motorway typically saves about £11.90.
Prices last refreshed at 10:32pm on 15 September 2026, supplied through the official UK Government fuel price open data scheme.
| Grade | M3 average | National average | Difference |
|---|---|---|---|
| Unleaded (E10) | 194.9p (4) | 171.1p | +23.8p |
| Diesel (B7) | 214.9p (4) | 193.6p | +21.3p |
| Premium Unleaded (E5) | 211.4p (4) | 188.3p | +23.1p |
| Super Diesel (SDV) | 231.4p (4) | 211.9p | +19.5p |
Every M3 service station, cheapest unleaded first
| Station | Unleaded | Diesel | Premium | Super diesel | Updated |
|---|---|---|---|---|---|
 Winchester North Connect Mwsa (SO21 1PP)24hM3 Motorway Northbound, Winchester, Hampshire | £8.86194.9p | £9.77214.9p | £9.82215.9p | £10.72235.9p | 2h ago |
| Winchester South Connect Mwsa (SO21 1PP)24hM3 Motorway Southbound, Winchester, Hampshire | £8.86194.9p | £9.77214.9p | £9.82215.9p | £10.72235.9p | 2h ago |
 Welcome Break Fleet South (GU51 1AA)24hMotorway Services, Fleet South, Fleet, Hampshire | £8.86194.9p | £9.77214.9p | £9.41206.9p | £10.32226.9p | 2h ago |
| Welcome Break Fleet North (GU51 1AA)24hMotorway Services, Fleet North, Fleet, Hampshire | £8.86194.9p | £9.77214.9p | £9.41206.9p | £10.32226.9p | 2h ago |
Prices are supplied through the official UK Government fuel price open data scheme (Open Government Licence v3.0). Road matching uses motorway geometry from OpenStreetMap, © OpenStreetMap contributors (ODbL), and the station's own published details.
Leaving at a junction?
Prices a mile or two off the M3 are usually far cheaper. Search any postcode along your route.
More motorways
All motorway services pricesQuestions about M3 fuel
- Where is the cheapest fuel on the M3?
- The cheapest reported unleaded at a M3 service station is £8.86 a gallon (194.9p per litre) at Winchester North Connect Mwsa near WINCHESTER. Prices were last refreshed at 10:32pm on 15 September 2026 from official UK Government fuel price data.
- How much more expensive is fuel on the M3?
- Across the 4 M3 service stations currently reporting unleaded, the average is £8.86 a gallon (194.9p per litre) against a national average of £7.78 (171.1p): 23.8p per litre more, about £11.90 on a 50-litre fill. Leaving at a junction usually beats filling at the services.
- Which stations count as M3 services?
- Stations flagged as motorway services in the official UK fuel price scheme, matched to the M3 by its road geometry (OpenStreetMap) or by the road named in the station's own published details.