Asda Plymouth Supercentre: 169.7p a litre, 4.2 miles away. 2.2p a litre cheaper: saves £1.21 a tank, and costs about £1.62 of fuel to get there and back. Not worth the trip.
Mfg Hartley: 169.9p a litre, 2.6 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.00 of fuel to get there and back. Worth the trip.
Mfg Morrisons Plymstock: 169.9p a litre, 3.3 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.27 of fuel to get there and back. Not worth the trip.
Mfg Budshead: 169.9p a litre, 3.3 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.27 of fuel to get there and back. Not worth the trip.
Mfg Plymouth: 169.9p a litre, 3.6 miles away. 2.0p a litre cheaper: saves £1.10 a tank, and costs about £1.39 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.