Unleaded: 174.9p a litre, 3.2p over the national average, filed Monday 26 October
Diesel: 198.9p a litre, 0.2p over the national average, filed Monday 26 October
Super unleaded: 199.9p a litre, filed Monday 26 October
Unleaded within 5 miles
Mfg Primrose: 167.9p a litre, 4.4 miles away. 7.0p a litre cheaper: saves £3.85 a tank, and costs about £1.67 of fuel to get there and back. Worth the trip.
Rontec Watford: 168.9p a litre, 2.1 miles away. 6.0p a litre cheaper: saves £3.30 a tank, and costs about 80p of fuel to get there and back. Worth the trip.
EG Watford Pfs: 169.9p a litre, 1.8 miles away. 5.0p a litre cheaper: saves £2.75 a tank, and costs about 69p of fuel to get there and back. Worth the trip.
South Oxhey Esso Express: 169.9p a litre, 2.6 miles away. 5.0p a litre cheaper: saves £2.75 a tank, and costs about £1.00 of fuel to get there and back. Worth the trip.
Shell Little Waitrose Sceptre: 169.9p a litre, 2.8 miles away. 5.0p a litre cheaper: saves £2.75 a tank, and costs about £1.08 of fuel to get there and back. Worth the trip.
Mfg Pinner: 169.9p a litre, 4.7 miles away. 5.0p a litre cheaper: saves £2.75 a tank, and costs about £1.81 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.