Petrol and diesel prices at Asda Shoeburyness Superstore

Asda Shoeburyness Superstore, SS3 8DA.

What it is charging

Unleaded: 169.7p a litre, 2.0p under the national average, filed Thursday 29 October

Starthill Service Station: 166.7p a litre, 4.9 miles away. 3.0p a litre cheaper: saves £1.65 a tank, and costs about £1.85 of fuel to get there and back. Not worth the trip.
Southend Extra - Petrol Filling Station: 167.9p a litre, 4.4 miles away. 1.8p a litre cheaper: saves 99p a tank, and costs about £1.67 of fuel to get there and back. Not worth the trip.
Toomey Southend Filling Station: 167.9p a litre, 5.0 miles away. 1.8p a litre cheaper: saves 99p a tank, and costs about £1.90 of fuel to get there and back. Not worth the trip.
Southchurch Esso Express: 169.9p a litre, 2.2 miles away
West Street SF Connect: 172.9p a litre, 3.5 miles away
London Road SF Connect: 172.9p a litre, 4.2 miles away

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.