Asda Worksop Sandy Lane: 171.7p a litre, 4.0 miles away. 2.2p a litre cheaper: saves £1.21 a tank, and costs about £1.56 of fuel to get there and back. Not worth the trip.
EG Dinnington Pfs: 171.9p a litre, 1.9 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 74p of fuel to get there and back. Worth the trip.
Ascona Wales Bar Service Station: 171.9p a litre, 3.3 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.28 of fuel to get there and back. Not worth the trip.
Beighton Park Service Station: 171.9p a litre, 4.6 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.79 of fuel to get there and back. Not worth the trip.
Asda South Anston Express Petrol: 172.9p a litre, 0.3 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 11p of fuel to get there and back. 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.