Fuel Prices in Rumney, Trowbridge, Llanrumney, St Mellons, C...
Live comparison for CF3 area. Tracking 30 stations across 26 brands. For a detailed breakdown including 7-day price trends, market competition analysis, and savings tips, and also find Today’s Cheapest Petrol and Diesel in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield .
Wales
30 Stations
15 Brands
Updated 19 Mar 2026
View Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield on the Fuel Map
Compare all 30 stations visually on our interactive map to find the cheapest fuel near your route.
7-Day Price Movement
Petrol (E10)
139.7p
143p
Diesel (B7)
157.4p
163.3p
Cheapest Today
Area Averages vs National
Petrol
141.5p
▼ 2.6p vs UK Avg
Super Unleaded
156.8p
▼ 5.3p vs UK Avg
Diesel
162.7p
▼ 2.7p vs UK Avg
Super Diesel
178.4p
▼ 7.5p vs UK Avg
All Fuel Stations in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield (CF3)
Pen-y-fai Service Station
LEYSHON FLINT & SONS, PEN Y FAI SERVICE STATION, PEN-Y-FAI, BRIDGEND, CF31 4LL, BRIDGEND, Wales
TEXACO
GRIFFITHS FORECOURTS, LLANTWIT MAIN SERVICE STATION, BEDDAU, PONTYPRIDD, CF38 2FF, PONTYPRIDD, Wales
BLACKMILL SERVICE STATION, MELIN IFAN DDU, PEN-Y-BONT AR OGWR, CF35 6DR, PEN-Y-BONT AR OGWR, BRIDGEND COUNTY BOROUGH, W
Church Village Service Station
TEXACO GARAGE, LLANTRISANT ROAD, LLANTWIT FARDRE, PONTYPRIDD, CF38 2HA, PONTYPRIDD, Wales
St Mellons Service Station
ST. MELLONS SERVICE STATION, NEWPORT ROAD, OLD ST. MELLONS, CARDIFF, CF3 5UG, CARDIFF, Wales
GULF
PONTYRHYL FILLING STATION, BRYN COTTAGES, PONTYRHYL, PEN-Y-BONT AR OGWR, CF32 8PX, PEN-Y-BONT AR OGWR, Wales
Frequently Asked Questions About Fuel in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield
As of 19 March 2026, the cheapest E10 petrol in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield is 134.7p at ASDA, PYLE INDUSTRIAL ESTATE, PYLE CROSS, PYLE, BRIDGEND, WALES.
There is currently a 16.2p difference between the cheapest and most expensive stations in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield. For a standard 55-litre family car, that equals a saving of £8.91 per tank.
We update prices daily using data provided directly by fuel stations via the Competition and Markets Authority (CMA) Open Data scheme. This is a UK Government initiative requiring all major retailers to report live prices, ensuring you see the most accurate data for the Cardiff area.
Not today. ASDA is actually cheaper than local supermarkets in CF3. It's always worth comparing before filling up.
We are currently tracking 30 active fuel stations in the CF3 area, operated by 15 different brands including TEXACO, ESSO, TESCO and more.
The cheapest B7 diesel in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield is currently 154.9p at SAINSBURY'S. You can also use our interactive fuel map to compare diesel prices visually.
Nearby Locations
Non-geographic (CF30)
Llanishen, Cyncoed, Pentwyn, Penylan, Pontprennau, Old St Mellons (CF23)
Cardiff (CF2)
Cardiff city centre, Cathays, Roath, Plasnewydd, Splott, Adamsdown (CF24)
Whitchurch, Thornhill, Lisvane, Rhiwbina, Pantmawr, Gabalfa, Heath, Llandaff North (CF14)
Non-geographic (CF95)
Non-geographic (CF99)
Newbridge, Risca, Rogerstone (NP1)
Prices sourced from the UK Government CMA Open Data Scheme, updated every 30 minutes. CheckFuelPrices is editorially independent — read our policy.