Petrol and diesel prices at Asda Cardiff Bay Superstore

Asda Cardiff Bay Superstore, CF11 0JR.

What it is charging

Unleaded: 169.9p a litre, 1.8p under the national average, filed Tuesday 27 October

Mfg Morrisons Cardiff Tyglass: 168.9p a litre, 4.9 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about £1.88 of fuel to get there and back. Not worth the trip.
Asda Leckwith Road Superstore: 169.7p a litre, 1.4 miles away. 0.2p a litre cheaper: saves 11p a tank, and costs about 54p of fuel to get there and back. Not worth the trip.
Mfg Morrisons Cardiff Bay: 169.9p a litre, 0.3 miles away
Mfg Ninian: 169.9p a litre, 1.1 miles away
Tudor Motors: 169.9p a litre, 1.5 miles away
Rontec Cathedral: 169.9p a litre, 1.9 miles away

On a 55-litre tank at 40mpg. The distance is straight-line rather than by road, so a real trip is longer than the one costed here.