Mfg Hucclecote: 166.9p a litre, 4.9 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.85 of fuel to get there and back. Not worth the trip.
Asda Cheltenham: 167.7p a litre, 1.6 miles away. 1.2p a litre cheaper: saves 66p a tank, and costs about 60p of fuel to get there and back. Worth the trip.
Mfg Morrisons UP Hatherley: 167.9p a litre, 1.1 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 41p of fuel to get there and back. Worth the trip.
Mfg Bouncers Lane: 167.9p a litre, 2.2 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 83p of fuel to get there and back. Not worth the trip.
Rontec Pirton Corner: 167.9p a litre, 4.4 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about £1.67 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.