Cheapest unleaded
171.9p
Fuel prices in NP18 today, 4 November 2026
Live petrol and diesel prices at 2 stations in the NP18 postcode area, cheapest first, from the government's Fuel Finder open data.
Cheapest diesel
198.9p
Avg unleaded (NP18)
172.4p
Avg diesel (NP18)
198.9p
2 fuel stations in the NP18 postcode area report pump prices to the government's Fuel Finder scheme. Unleaded runs from 171.9p at Gulf up to 172.9p, a 1.0p gap across NP18, so it pays to check before you fill up. On average NP18 is 1.7p dearer than the UK as a whole.
Gulf
Hillcroft Garage, Chepstow Road, Langstone, Casnewydd
NP18 2JN
Air · Water · Toilets
Unleaded171.9p
Diesel198.9p
Spar
Spar Stores, Ponthir Road, Caerleon, Casnewydd
NP18 3NY
Price last reported 26 Sept
Unleaded172.9p
Diesel199.9p
Data updated 2 hours ago.
Cheapest fuel in NP18: quick answers
Where is the cheapest petrol in NP18?
The cheapest unleaded in the NP18 postcode area right now is 171.9p per litre at Gulf, HILLCROFT GARAGE, CHEPSTOW ROAD, LANGSTONE, CASNEWYDD. The NP18 average is 172.4p.
Where is the cheapest diesel in NP18?
The lowest diesel price in NP18 is currently 198.9p per litre at Gulf, HILLCROFT GARAGE, CHEPSTOW ROAD, LANGSTONE, CASNEWYDD.