Asda Plymouth Supercentre: 169.7p a litre, 3.1 miles away. 2.2p a litre cheaper: saves £1.21 a tank, and costs about £1.19 of fuel to get there and back. Worth the trip.
Mfg Hartley: 169.9p a litre, 1.4 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 54p of fuel to get there and back. Worth the trip.
Mfg Budshead: 169.9p a litre, 2.1 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 81p of fuel to get there and back. Worth the trip.
Mfg Plymouth: 169.9p a litre, 2.7 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.04 of fuel to get there and back. Worth the trip.
Mfg Landmark: 169.9p a litre, 2.8 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.08 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.