Asda Plymouth Supercentre: 169.7p a litre, 2.6 miles away. 2.2p a litre cheaper: saves £1.21 a tank, and costs about £1.00 of fuel to get there and back. Worth the trip.
Mfg Hartley: 169.9p a litre, 0.9 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 34p of fuel to get there and back. Worth the trip.
Mfg Budshead: 169.9p a litre, 1.7 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 65p of fuel to get there and back. Worth the trip.
Mfg Landmark: 169.9p a litre, 2.3 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 88p of fuel to get there and back. Worth the trip.
Mfg Plymouth: 169.9p a litre, 2.4 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about 92p 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.