Petrol and diesel prices at Asda Wells Express Petrol

Asda Wells Express Petrol, BA5 2PT.

What it is charging

Unleaded: 174.9p a litre, 3.2p over the national average, filed Tuesday 27 October
Super unleaded: 193.9p a litre, filed Tuesday 27 October

Mfg Morrisons Wells: 171.9p a litre, 0.4 miles away. 3.0p a litre cheaper: saves £1.65 a tank, and costs about 15p of fuel to get there and back. Worth the trip.
Mfg Wells: 172.9p a litre, 0.8 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 31p of fuel to get there and back. Worth the trip.
Shepton Mallet Superstore - Petrol Filling Station: 172.9p a litre, 4.7 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.84 of fuel to get there and back. Not worth the trip.

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.