Petrol and diesel prices at Mfg Morrisons Carmarthen

Mfg Morrisons Carmarthen, SA31 2NF.

What it is charging

Unleaded: 167.9p a litre, 3.8p under the national average, filed Friday 30 October
Diesel: 194.9p a litre, 3.8p under the national average, filed Saturday 17 October

Tanerdy Garage: 165.9p a litre, 1.5 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 56p of fuel to get there and back. Worth the trip.
Gwalia Garage: 165.9p a litre, 4.5 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.69 of fuel to get there and back. Not worth the trip.
Vst Towy Services Station: 167.9p a litre, 0.6 miles away
Ascona Tenby Road Service Station: 167.9p a litre, 3.1 miles away
Carmarthen Extra - Petrol Filling Station: 169.9p a litre, 0.7 miles away
oil 4 wales ltd Nantycaws: 169.9p a litre, 3.9 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.