Winchmore Hill Esso Express: 167.9p a litre, 1.6 miles away. 6.0p a litre cheaper: saves £3.30 a tank, and costs about 61p of fuel to get there and back. Worth the trip.
Mfg Southgate: 167.9p a litre, 1.8 miles away. 6.0p a litre cheaper: saves £3.30 a tank, and costs about 68p of fuel to get there and back. Worth the trip.
Colney Hatch Extra - Petrol Filling Station: 167.9p a litre, 2.0 miles away. 6.0p a litre cheaper: saves £3.30 a tank, and costs about 76p of fuel to get there and back. Worth the trip.
Mfg Northumberland Park: 167.9p a litre, 2.4 miles away. 6.0p a litre cheaper: saves £3.30 a tank, and costs about 91p of fuel to get there and back. Worth the trip.
Tgc - Barnet: 167.9p a litre, 2.5 miles away. 6.0p a litre cheaper: saves £3.30 a tank, and costs about 95p 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.