Sandybank Garage: 162.9p a litre, 1.3 miles away. 3.0p a litre cheaper: saves £1.65 a tank, and costs about 48p of fuel to get there and back. Worth the trip.
Rossendale Service Station: 162.9p a litre, 1.6 miles away. 3.0p a litre cheaper: saves £1.65 a tank, and costs about 59p of fuel to get there and back. Worth the trip.
Tesco Rawtenstall - Petrol Filling Station: 163.9p a litre, 0.6 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 22p of fuel to get there and back. Worth the trip.
Gem Bacup: 163.9p a litre, 3.5 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.30 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.