Fuel Prices in Rumney, Trowbridge, Llanrumney, St Mellons, C...
Live comparison for CF3 area. Tracking 31 stations across 25 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
31 Stations
16 Brands
Updated 3 Aug 2026
View Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield on the Fuel Map
Compare all 31 stations visually on our interactive map to find the cheapest fuel near your route.
7-Day Price Movement
Petrol (E10)
156.5p
157.7p
Diesel (B7)
173.9p
179.9p
Cheapest Today
Area Averages vs National
Petrol
156.8p
▼ 2.0p vs UK Avg
Super Unleaded
171.6p
▼ 5.2p vs UK Avg
Diesel
179.0p
▼ 2.0p vs UK Avg
Super Diesel
193.7p
▼ 6.0p vs UK Avg
All Fuel Stations in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield (CF3)
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, Wales
Frequently Asked Questions About Fuel in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield
As of 3 August 2026, the cheapest E10 petrol in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield is 147.9p at SAINSBURY'S, 6A WELSH DESIGNER OUTLET VILLAGE, BRIDGEND, WALES.
There is currently a 15.0p 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 £8.25 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. SAINSBURY'S is actually cheaper than local supermarkets in CF3. It's always worth comparing before filling up.
We are currently tracking 31 active fuel stations in the CF3 area, operated by 16 different brands including TEXACO, ESSO, TESCO and more.
The cheapest B7 diesel in Rumney, Trowbridge, Llanrumney, St Mellons, Castleton, Marshfield is currently 164.9p at ASDA. 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.