Colney Hatch Extra - Petrol Filling Station: 167.9p a litre, 0.9 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 34p of fuel to get there and back. Worth the trip.
Tgc - Barnet: 167.9p a litre, 1.1 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 41p of fuel to get there and back. Worth the trip.
Mfg Southgate: 167.9p a litre, 1.2 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 45p of fuel to get there and back. Worth the trip.
Mfg Whetstone: 167.9p a litre, 1.6 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 61p of fuel to get there and back. Not worth the trip.
Barnet Esso Express: 167.9p a litre, 2.3 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about 87p 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.