Petrol and diesel prices at Asda Wootton Bassett Express Petrol

Asda Wootton Bassett Express Petrol, SN4 7AS.

What it is charging

Unleaded: 172.9p a litre, 1.2p over the national average, filed Tuesday 27 October
Super unleaded: 191.9p a litre, filed Tuesday 27 October

Ascona Coped Hall Service Station: 168.9p a litre, 0.6 miles away. 4.0p a litre cheaper: saves £2.20 a tank, and costs about 23p of fuel to get there and back. Worth the trip.
Sainsburys Bridgemead: 169.9p a litre, 4.0 miles away. 3.0p a litre cheaper: saves £1.65 a tank, and costs about £1.54 of fuel to get there and back. Worth the trip.
Pgg Kings Hill: 172.9p a litre, 4.5 miles away
Show Meadow SF Connect: 173.9p a litre, 0.3 miles away
Shell Co-op Mead Way: 174.9p a litre, 3.6 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.