Live prices
Cheapest diesel (B7) in Casnewydd
5 stations reporting diesel (B7), ranked cheapest first.
The cheapest reported diesel (B7) in Casnewydd is £8.68 a gallon (190.9p per litre) at Tesco, Unit 6 Harlech Retail Park, Cardiff Road, Casnewydd (NP20 3BA). The average across 5 forecourts currently reporting this grade is £8.88 a gallon (195.3p per litre), so choosing the cheapest rather than an average-priced forecourt saves about £2.20 on a 50-litre fill. That local average is 0.9p per litre below the UK average of 196.2p.
The average has risen 0.4p per litre since yesterday. The average has risen 3.4p per litre since last week.
Prices last refreshed at 1:31am on 19 September 2026, supplied through the official UK Government fuel price open data scheme and checked every 30 minutes.
| Station | Unleaded | Diesel | Premium | Super diesel | Updated |
|---|---|---|---|---|---|
 Newport Extra - Petrol Filling Station (NP20 3BA)Unit 6 Harlech Retail Park, Cardiff Road, Casnewydd | £7.63167.9p | £8.68190.9p | £8.09177.9p | ---- | 19 Sept 2026, 00:31 |
 Hillcroft Stores (NP18 2JN)Hillcroft Garage, Chepstow Road, Langstone, Casnewydd | £7.77170.9p | £8.91195.9p | ---- | ---- | 19 Sept 2026, 00:31 |
 Newport Chepstow Rd Esso Express (NP19 9EZ)Chepstow RD, Casnewydd | £7.77170.9p | £8.91195.9p | £8.45185.9p | £9.54209.9p | 19 Sept 2026, 00:31 |
 Br Ponthir (NP18 3NY)Spar Stores, Ponthir Road, Caerleon, Casnewydd | £7.91173.9p | £8.95196.9p | ---- | ---- | 19 Sept 2026, 00:31 |
| Esso Sinclair Garages (NP19 0HE)24hSinclair Garages, Corporation Road, Casnewydd, NP19 0HE, Casnewydd | £8.00175.9p | £8.95196.9p | £9.09199.9p | ---- | 19 Sept 2026, 00:31 |
Prices are supplied through the official UK Government fuel price open data scheme (Open Government Licence v3.0) and checked every 30 minutes. Only stations reporting diesel (B7) appear here.
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Questions about diesel (B7) in Casnewydd
- Where is the cheapest diesel (B7) in Casnewydd?
- The cheapest reported diesel (B7) in Casnewydd is 190.9p per litre at Tesco, Unit 6 Harlech Retail Park, Cardiff Road, Casnewydd (NP20 3BA). The average across 5 forecourts reporting this grade is 195.3p per litre. Prices were last refreshed at 1:31am on 19 September 2026 from official UK Government fuel price data.
- How many stations in Casnewydd sell diesel (B7)?
- 5 forecourts in Casnewydd currently report a price for diesel (B7) through the official UK fuel price open data scheme. Stations that do not sell or report this grade are not counted.