M4 services fuel prices
Live petrol and diesel prices at all 11 M4 service areas, in junction order, with the cheaper forecourts just off the motorway.
Unleaded at M4 services has a median of 195.9p a litre, 24.0p more than the 171.9p median of the cheapest forecourts off the motorway within 5 miles of each of its 11 service areas. Diesel at M4 services has a median of 217.9p a litre, 22.0p more than the 195.9p median of the cheapest forecourts off the motorway within 5 miles of each of its 11 service areas.
As of , when this page was generated from the latest Fuel Finder prices.
How much is unleaded at M4 services today?
The cheapest unleaded at M4 services is 176.9p a litre at Magor (J23a), and the dearest 199.9p at Swansea. The median across its 14 forecourts with a reliable price for it is 195.9p, 21.0p more than the 174.9p typical of a UK forecourt off the motorway that isn’t a supermarket (supermarkets: 171.9p). Across every forecourt the Government's feed flags as motorway services, the median is 195.9p.
How much is diesel at M4 services today?
The cheapest diesel at M4 services is 202.9p a litre at Magor (J23a), and the dearest 219.9p at Swansea. The median across its 14 forecourts with a reliable price for it is 217.9p, 18.0p more than the 199.9p typical of a UK forecourt off the motorway that isn’t a supermarket (supermarkets: 197.9p). Across every forecourt the Government's feed flags as motorway services, the median is 217.9p.
Every M4 services, in junction order
| Services | Forecourt | E10 | Diesel |
|---|---|---|---|
| Heston · J2–3 | Heston East Service Area | 199.9p | 219.9p |
| Heston West Service Area | 199.9p | 219.9p | |
| Reading · J11–12 | Reading East Connect MWSA | 195.9p | 217.9p |
| Reading West Connect MWSA | 195.9p | 217.9p | |
| Chieveley · J13 | Chieveley Service Area | 199.9p | 219.9p |
| Membury · J14–15 | Welcome Break Membury East | 195.9p | 217.9p |
| Welcome Break Membury West | 195.9p | 217.9p | |
| Leigh Delamere · J17–18 | Leigh Delamere East Service Area | 199.9p | 219.9p |
| Leigh Delamere West Service Area | 199.9p | 219.9p | |
| Magor · J23a | Rontec Magor | 176.9p | 202.9p |
| Cardiff Gate · J30 | Welcome Break Cardiff | 178.9p | 203.9p |
| Cardiff West · J33 | Rontec Cardiff West | 176.9p | 202.9p |
| Sarn Park · J36 | Welcome Break Sarn Park | 178.9p | 203.9p |
| Swansea · J47 | Swansea Service Area | 199.9p | 219.9p |
| Pont Abraham · J49 | Asda Pont Abraham Express Petrol — temporarily closed | — | — |
Cheaper fuel just off the M4
The cheapest forecourt off the motorway within 5 miles of each services, as the crow flies, and how much less it charges than the services itself.
| Near | Cheapest unleaded nearby | Cheapest diesel nearby |
|---|---|---|
| Heston · J2–3 | Costco Wholesale Sunbury 164.9p — 35.0p less, 4.8 mi away | Costco Wholesale Sunbury 188.9p — 31.0p less, 4.8 mi away |
| Reading · J11–12 | Costco Wholesale Reading 171.9p — 24.0p less, 2.0 mi away | Costco Wholesale Reading 194.9p — 23.0p less, 2.0 mi away |
| Chieveley · J13 | Chieveley Motors 177.9p — 22.0p less, 1.8 mi away | Chieveley Motors 198.9p — 21.0p less, 1.8 mi away |
| Membury · J14–15 | Asda Hungerford Express Petrol 177.9p — 18.0p less, 4.8 mi away | Asda Hungerford Express Petrol 199.9p — 18.0p less, 4.8 mi away |
| Leigh Delamere · J17–18 | Sainsburys Chippenham 171.9p — 28.0p less, 4.3 mi away | Sainsburys Chippenham 196.9p — 23.0p less, 4.3 mi away |
| Magor · J23a | Caldecot Fuel Express Automat 173.7p — 3.2p less, 3.6 mi away | Newport Spytty Extra - Petrol Filling Station 196.9p — 6.0p less, 4.7 mi away |
| Cardiff Gate · J30 | Tudor Motors 171.9p — 7.0p less, 4.9 mi away | Asda Newport Superstore 196.7p — 7.2p less, 4.8 mi away |
| Cardiff West · J33 | Sainsburys Talbot Green 167.9p — 9.0p less, 3.8 mi away | Sainsburys Talbot Green 194.9p — 8.0p less, 3.8 mi away |
| Sarn Park · J36 | Cowbridge Road Service Station 169.9p — 9.0p less, 2.5 mi away | Murco, Pen-y-Fai Service Station 195.9p — 8.0p less, 1.0 mi away |
| Swansea · J47 | Asda Gorseinon Superstore 171.7p — 28.2p less, 1.8 mi away | Asda Gorseinon Superstore 194.7p — 25.2p less, 1.8 mi away |
| Pont Abraham · J49 | No reliable unleaded price at these services | No reliable diesel price at these services |
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Frequently Asked Questions
Why is fuel more expensive at motorway services?
Motorway service areas pay high rents and operating costs, run around the clock, and face little competition: once you are on the motorway, the next forecourt may be twenty miles away. Right now unleaded at forecourts the Government's feed flags as motorway services has a median of 195.9p a litre, against 174.9p at forecourts off the motorway that aren't supermarkets: a gap of 21.0p.
Is it worth leaving the M4 to fill up?
Often, if you need a full tank. The table above shows the cheapest forecourt within 5 miles of each services and how much less it charges. Distances are as the crow flies from the services, so allow for the drive from the junction and back; on a 50-litre fill, a 20p difference is £10.
How often do these prices update?
Prices come from the UK Government's Fuel Finder scheme, which retailers are required to keep current, and this site reads it about every 30 minutes.