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Petrol Prices in Casnewydd

Average today: unleaded 170.1p · diesel 191.9p · UK average 169.6p / 191.4p

Checked 13 September 2026 · retailer-reported prices, changes filed within 30 minutes
Casnewydd trend: Unleaded ▲ 5.2p · 7d · Diesel ▲ 5.8p · 7d
The cheapest unleaded in Casnewydd today is 163.9p at Tesco, Unit 6 Harlech Retail Park. Filling a 55-litre tank at the cheapest station instead of the priciest saves about £6.60.

Cheapest Unleaded First

CheapestSet 11 Sep · Checked today
Tesco Unit 6 Harlech Retail Park, NP20 3BA
UNLEADED
163.9p
DIESEL
185.9p
Save up to £6.60 on a tank
Set 11 Sep · Checked today
Esso Chepstow Rd, NP19 9EZ
UNLEADED
167.9p
DIESEL
191.9p
Save up to £4.40 on a tank
Set 08 Sep · Checked today
Gulf Hillcroft Garage, NP18 2JN
UNLEADED
169.9p
DIESEL
191.9p
Save up to £3.30 on a tank
Set 11 Sep · Checked today
Spar Spar Stores, NP18 3NY
UNLEADED
172.9p
DIESEL
192.9p
Costs £4.95 more to fill up
Set 11 Sep · Checked today
Esso Sinclair Garages Sinclair Garages, NP19 0HE
UNLEADED
175.9p
DIESEL
196.9p
Costs £6.60 more to fill up
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