M4 · London to South Wales
Wrong fuel on the M4
Misfuelled on the M4? We cover the whole route, west from Chiswick past Heathrow, Reading, Swindon and Bristol, over the Prince of Wales Bridge to Newport, Cardiff and Swansea, 24 hours a day.
Broken down on the carriageway? Hazards on, leave by the nearside door, get behind the barrier. In a live lane or in danger, call 999 first. Never let anyone work on a car on the hard shoulder.
Service areas
M4 services we attend
- Heston servicesM4 J2–3
- Reading servicesM4 J11–12
- Chieveley servicesM4 J13
- Membury servicesM4 J14–15
- Leigh Delamere servicesM4 J17–18
- Magor servicesM4 J23a
- Cardiff West servicesM4 J33
- Sarn Park servicesM4 J36
- Swansea servicesM4 J47
- Pont Abraham servicesM4 J49
Towns along the M4
- Wrong fuel Acton
- Wrong fuel Almondsbury
- Wrong fuel Alperton
- Wrong fuel Ascot
- Wrong fuel Ashford
- Wrong fuel Avonmouth
- Wrong fuel Barnes
- Wrong fuel Battersea
- Wrong fuel Bayswater
- Wrong fuel Binfield
- Wrong fuel Bourne End
- Wrong fuel Bracknell
- Wrong fuel Bradley Stoke
- Wrong fuel Brent
- Wrong fuel Brentford
- Wrong fuel Bridgend
- Wrong fuel Bristol
- Wrong fuel Burry Port
- Wrong fuel Caerleon
- Wrong fuel Caerphilly
- Wrong fuel Caldicot
- Wrong fuel Cardiff
- Wrong fuel Chepstow
- Wrong fuel Chippenham
- Wrong fuel Cowbridge
- Wrong fuel Llanelli
- Wrong fuel Maesteg
- Wrong fuel Neath
- Wrong fuel Newport
- Wrong fuel Pontardawe
- Wrong fuel Pontypridd
- Wrong fuel Port Talbot
- Wrong fuel Porth
- Wrong fuel Porthcawl
- Wrong fuel Portishead
- Wrong fuel Reading
- Wrong fuel Risca
- Wrong fuel Slough
- Wrong fuel Swansea
- Wrong fuel Swindon
FAQs
M4 misfuel questions
I've put the wrong fuel in at M4 services. What now?+
Leave the engine off. Put the car in neutral and, with staff help, push it clear of the pump. Tell the cashier, then call us. We drain cars on motorway forecourts and in services car parks every day.
My car cut out on the M4 after filling up.+
Get everyone out by the nearside door and behind the barrier. If you're in a live lane or feel in danger, call 999. Then call us — we'll arrange for the car to be moved somewhere safe before draining it.
Can I drive to the next junction?+
Please don't. Running the engine on the wrong fuel is what causes expensive damage, and breaking down in a live lane is dangerous.
Wrong fuel on the M4? Stay off the carriageway.
Call now for a fixed price and a real arrival time. 24 hours a day, 7 days a week, 365 days a year.