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Petrol Prices in Casnewydd

Average today: unleaded 161.5p · diesel 182.1p · UK average 161.4p / 182.6p

Checked 23 August 2026 · retailer-reported prices, changes filed within 30 minutes
Casnewydd trend: Unleaded ▲ 0.4p · 7d · Diesel ▲ 0.6p · 7d
The cheapest unleaded in Casnewydd today is 158.9p at Tesco, Unit 6 Harlech Retail Park. Filling a 55-litre tank at the cheapest station instead of the priciest saves about £3.85.

Cheapest Unleaded First

CheapestSet 20 Aug · Checked today
Tesco Unit 6 Harlech Retail Park, NP20 3BA
UNLEADED
158.9p
DIESEL
176.9p
Save up to £3.85 on a tank
Set 11 Aug · Checked today
Esso Chepstow Rd, NP19 9EZ
UNLEADED
159.9p
DIESEL
180.9p
Save up to £3.30 on a tank
Set 18 Aug · Checked today
Gulf Hillcroft Garage, NP18 2JN
UNLEADED
159.99p
DIESEL
179.9p
Save up to £3.25 on a tank
Set 05 Aug · Checked today
Spar Spar Stores, NP18 3NY
UNLEADED
162.9p
DIESEL
183.9p
Costs £2.20 more to fill up
Set 21 Aug · Checked today
Esso Sinclair Garages Sinclair Garages, NP19 0HE
UNLEADED
165.9p
DIESEL
188.9p
Costs £3.85 more to fill up
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