Cheapest fuel prices in Cardiff and how to get £5 off offer running out soon

Postcode search tool shows where cheapest and most expensive petrol is in Cardiff

The cheapest place in Cardiff to fill up your car with petrol is at a Tesco garage in the city. According to the latest data supplied by retailers, a driver in an average family car could save up to £3 by filling up at this forecourt, compared to the most expensive petrol station.

The Tesco garage at Tesco Express, Whitchurch, Cardiff is charging motorists 154.9p per litre, which means it would cost £103 to fill up an average 55 litre tank. This is based on a feed of live petrol prices published by the Department for Energy Security and Net Zero.

Additionally, TopCashback is offering £5 cashback on any fuel purchase of £10 or more, making it possible to receive £5 off fuel. All drivers must do to be eligible for this offer is sign up as a new TopCashback customer. Numerous fuel brands, such as Morrisons, Tesco, Co-operative, Asda, Texaco, BP, Esso, Total, Shell, Jet, and Gulf, are eligible for the offer. The TopCashback fuel offer is only valid until Thursday, April 30, 2026.

See more information on Topcashback and how to redeem the £5 cashback offer on fuel at the bottom of this article.

Here are the Cheapest places to top up your car with petrol in Cardiff

• 154.9p – Tesco, Tesco Express, Cardiff, CF14 6BN
• 158.9p – Esso, Llantrisant Road, Cardiff, CF5 2PY
• 159.9p – Esso, 235 Corporation Road, Cardiff, Glamorgan, CF11 7AS
• 159.9p – Tivoli Service Station, Cardiff, CF14 2FF
• 159.9p – Bp, M4 Junction 33, Nr Pontyclun, Mid Glamorgan, CF72 8SA
• 160.9p – Texaco, Llantrisant Road, Cardiff, CF5 2PW

The most expensive filling station in Cardiff is a Texaco station at Llantrisant Road, Cardiff. The cost of standard petrol at this station is 160.9p, meaning it would cost a total of £106 to fill up an average family car at this forecourt. For the owners of diesel cars, the cheapest place to fill up is the Tesco garage at Cardiff. The cost of a litre of standard diesel at this forecourt was 186.9p, according to prices supplied by retailers.Here are the cheapest places to fill up your car with standard diesel in Cardiff this weekend.

• 186.9p – Tesco, Tesco Express, Cardiff, CF14 6BN
• 189.9p – Esso, 235 Corporation Road, Cardiff, Glamorgan, CF11 7AS
• 189.9p – Esso, Llantrisant Road, Cardiff, CF5 2PY
• 189.9p – Tivoli Service Station, Cardiff, CF14 2FF
• 191.9p – Texaco, Llantrisant Road, Cardiff, CF5 2PW
• 192.9p – Bp, M4 Junction 33, Nr Pontyclun, Mid Glamorgan, CF72 8SA

To get an extra fiver off with the TopCashback new member fuel deal, there are three simple steps to take:

1. Purchase fuel costing £10 or more.
2. Upload a photo of your receipt to the TopCashback site here.
3. Receive £5 cashback in your TopCashback account.

This offer is valid until April 30, 2026. The terms and conditions are here.