M4
Westbound
The West · Reading · Swindon · S. Wales
M4Westbound · The West · Reading · Swindon · S. Wales
Cheapest on route
156.9p
COSTCO WHOLESALE
Off-junction avg
178.8p
161 stations ≤2 mi
Services avg
199.9p
15 motorway MSAs
Service premium
+21.1p
vs off-junction
  1. JCT1
  2. JCT2
  3. JCT3
  4. JCT4
  5. JCT4b
  6. JCT5
  7. JCT6
  8. JCT7
  9. JCT8/9
  10. JCT10
    Wokingham · BracknellA329(M)
    No fuel stations linked to this junction yet.
  11. JCT11
  12. JCT12
  13. JCT13
  14. JCT14
  15. JCT15
    Swindon EastA419
    No fuel stations linked to this junction yet.
  16. JCT16
  17. JCT17
  18. JCT18
    Bath · StroudA46
    No fuel stations linked to this junction yet.
  19. JCT19
  20. JCT20
    Almondsbury InterchangeM5
    No fuel stations linked to this junction yet.
  21. JCT21
    AustA403
    No fuel stations linked to this junction yet.
  22. JCT22
    Severn BridgeM48
    No fuel stations linked to this junction yet.
  23. JCT23
    MagorB4245
    No fuel stations linked to this junction yet.
  24. JCT23a
  25. JCT24
  26. JCT25
  27. JCT25a
  28. JCT26
    Newport · MalpasA4051
    No fuel stations linked to this junction yet.
  29. JCT27
  30. JCT28
  31. JCT29
  32. JCT30
  33. JCT31
  34. JCT32
  35. JCT33
  36. JCT34
  37. JCT35
  38. JCT36
  39. JCT37
  40. JCT38
    MargamA48
    No fuel stations linked to this junction yet.
  41. JCT39
  42. JCT40
  43. JCT41
  44. JCT42
    EarlswoodA483
    No fuel stations linked to this junction yet.
  45. JCT43
  46. JCT44
  47. JCT45
  48. JCT46
  49. JCT47
  50. JCT48
  51. JCT49
Station prices versus distance from junction164p172p181pon motorway2 mi off junction
Motorway servicesOff-junction (≤2 mi)
Pull off & save
23.9p
cheaper per litre, on average, at a station within 2 miles of a junction than at the motorway services.
£13.13 on a 55-litre fill.

What's at the services

JCT3
BP
On motorway
FuelAir & water
JCT3
BP
On motorway
FuelAir & water
JCT12
BP
On motorway
FuelToilets
JCT12
BP
On motorway
FuelToilets
JCT13
BP
On motorway
FuelAir & water
JCT14
WELCOME BREAK
On motorway
FuelToiletsAir & water
JCT14
WELCOME BREAK
On motorway
FuelToiletsAir & water
JCT17
BP
On motorway
FuelToiletsAir & water
JCT17
BP
On motorway
FuelToiletsAir & water
JCT23a
ESSO
On motorway
FuelToiletsAir & water
JCT30
WELCOME BREAK
On motorway
FuelToiletsAir & water
JCT33
BP
On motorway
FuelToiletsAir & water
JCT36
WELCOME BREAK
On motorway
FuelToiletsAir & water
JCT47
BP
On motorway
FuelToiletsAir & water
JCT49
ESSO
On motorway
FuelToilets

About fuel on this motorway

Petrol and diesel along the M4

The M4 runs london to south wales. Along the 51 junctions we track you'll find both on-motorway service areas (MSAs) that you can only reach from the road itself, and off-junction forecourts within 2 miles of a slip road.

How we group stations

Each junction lists every forecourt within 2 miles of the slip road, sorted by price. Motorway service areas appear inline on the junction they sit between. Toggle the direction of travel to filter down to just the carriageway you're on.

Is it cheaper to fill up off the motorway?

Right now the average motorway service area on the M4 charges 199.9p/L, versus 178.8p/L at nearby off-junction stations — a services premium of 21.1p/L. A 55-litre fill would cost about £11.61 more at the services.

How up-to-date are these prices?

Prices are refreshed from government open data every 15 minutes. The most recent update per station is shown next to each row.

Frequently asked questions

Q.How many fuel stations are along the M4?
We track 176 stations across 51 junctions — including on-motorway service areas and nearby off-junction forecourts within 2 miles of a slip road.
Q.Are motorway service areas more expensive than off-junction stations?
Usually, yes. On the M4 the average services premium is currently 21.1p/L over nearby off-junction stations. Prices vary day-to-day, so use the direction toggle and fuel selector above to compare the exact prices at each MSA against off-junction stations you can reach from the same junction.
Q.Where does the fuel price data come from?
Retailers publish prices under the government's Fuel Finder scheme. We refresh from those feeds roughly every 15 minutes and show the last-updated time on each station row.
Q.Can I get to any of these forecourts without leaving the M4?
Only the stations tagged "Motorway services" are directly on the M4. Everything else requires exiting at the junction listed on the row — the distance shown is the road distance from the slip road.