Weekly bulletin, 12 to 18 October 2026. Published Monday 19 October 2026.
Petrol prices in the Cardiff postcode area (CF): down 0.9p this week to 172.6p
Between Monday 12 October 2026 and Sunday 18 October 2026, the average price of unleaded across 49 filling stations in the Cardiff postcode area (CF) fell 0.9p to 172.6p a litre, while diesel fell 0.8p to 198.1p.
Cheapest and most expensive
On Sunday 18 October 2026, prices updated within 30 days, judged against their neighbours.
The last 30 days
Daily averages, in pence per litre. Right-click the image to save it; it is free to publish with a link.
Towns in the Cardiff postcode area (CF) where unleaded moved most
Towns with at least three filling stations, first to last day of the week.
Biggest falls
| Town | Stations | Now | Week |
|---|---|---|---|
| Cardiff | 7 | 173.6p | ▼ 0.7p |
Biggest rises
| Town | Stations | Now | Week |
|---|
Ready to copy
The weekly change compares the same 23 filling stations with an unleaded price on both days, so a station dropping out of the figures does not move it.
63 of the 101 stations seen during the week changed at least one price.
The cheapest unleaded in the Cardiff postcode area (CF) on Sunday 18 October 2026 was 167.9p at Llanharan Service Station, Pont-y-clun (CF72 9NR); the most expensive was 178.9p at Valley Heights Service Station, Merthyr Tudful (CF48 2YE), a gap of 11.0p, or £5.50 on a 50-litre tank.
The cheapest diesel was 194.9p at Hengoed Ystrad Mynach Superstore - Petrol Filling Station, Hengoed (CF82 7DP).
Across the UK, unleaded was down 0.8p over the same week, at 172.7p, which puts the Cardiff postcode area (CF) 0.1p below the national average.
Among the towns of the Cardiff postcode area (CF), unleaded fell most in Cardiff (down 0.7p to 173.6p).
"Drivers in the Cardiff postcode area (CF) paid 0.9p less for a litre of unleaded this week. On a 50-litre tank, that is £0.45 less than a week earlier. The gap between the cheapest and the dearest forecourt in the Cardiff postcode area (CF) is 11.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk.
Show the plain text
Petrol prices in the Cardiff postcode area (CF): down 0.9p this week to 172.6p Between Monday 12 October 2026 and Sunday 18 October 2026, the average price of unleaded across 49 filling stations in the Cardiff postcode area (CF) fell 0.9p to 172.6p a litre, while diesel fell 0.8p to 198.1p. The weekly change compares the same 23 filling stations with an unleaded price on both days, so a station dropping out of the figures does not move it. 63 of the 101 stations seen during the week changed at least one price. The cheapest unleaded in the Cardiff postcode area (CF) on Sunday 18 October 2026 was 167.9p at Llanharan Service Station, Pont-y-clun (CF72 9NR); the most expensive was 178.9p at Valley Heights Service Station, Merthyr Tudful (CF48 2YE), a gap of 11.0p, or £5.50 on a 50-litre tank. The cheapest diesel was 194.9p at Hengoed Ystrad Mynach Superstore - Petrol Filling Station, Hengoed (CF82 7DP). Across the UK, unleaded was down 0.8p over the same week, at 172.7p, which puts the Cardiff postcode area (CF) 0.1p below the national average. Among the towns of the Cardiff postcode area (CF), unleaded fell most in Cardiff (down 0.7p to 173.6p). "Drivers in the Cardiff postcode area (CF) paid 0.9p less for a litre of unleaded this week. On a 50-litre tank, that is £0.45 less than a week earlier. The gap between the cheapest and the dearest forecourt in the Cardiff postcode area (CF) is 11.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk. Source: fuelpricetoday.co.uk, weekly bulletin for the Cardiff postcode area (CF), 12 to 18 October 2026. https://fuelpricetoday.co.uk/press/2026-W42/area-cf Prices are pence per litre, computed from the government's Fuel Finder open data. Free to use with a link to the source.
Download the data
- Every station (CSV)
Name, brand, postcode, coordinates, unleaded and diesel on 12 Oct and 18 Oct.
- This bulletin (JSON)
All the figures on this page, with the 30-day series.
- The chart (PNG)
1200 by 630 pixels, white background.
Terms of use
Free to use, quote and publish, including the chart and the data, with a link to https://fuelpricetoday.co.uk/press/2026-W42/area-cf or a credit to fuelpricetoday.co.uk. Prices are computed from the Fuel Finder open data published by the Department for Energy Security and Net Zero under the Open Government Licence v3.0. Questions, a figure for another area, or a quote: contact@fuelpricetoday.co.uk.
How the figures are computed
Each average is the mean of the prices changed in the last 7 days at the filling stations of the Cardiff postcode area (CF), motorway services left out and prices more than 25p from the day's median discarded. The cheapest and most expensive stations are judged against the stations within 10 km, so that a typing error cannot top the list. The week runs from Monday to Sunday. Details on how this site works.