Petrol and diesel prices at Thornbury Motors Ltd

Thornbury Motors Ltd, BS35 2EF.

What it is charging

Unleaded: 172.9p a litre, 1.2p over the national average, filed Wednesday 28 October
Diesel: 196.9p a litre, 1.8p under the national average, filed Wednesday 28 October

Western Garage: 165.9p a litre, 4.9 miles away. 7.0p a litre cheaper: saves £3.85 a tank, and costs about £1.84 of fuel to get there and back. Worth the trip.
Mfg Almondsbury: 171.9p a litre, 3.2 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about £1.25 of fuel to get there and back. Not worth the trip.
Thornbury Superstore - Petrol Filling Station: 172.9p a litre, 0.4 miles away
Severn View Service Area: 194.9p a litre, 4.5 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.