Petrol and diesel prices at Asda Waterlooville Superstore

Asda Waterlooville Superstore, PO7 7XR.

What it is charging

Unleaded: 169.7p a litre, 2.0p under the national average, filed Thursday 29 October
Diesel: 196.7p a litre, 2.0p under the national average, filed Monday 26 October

Emsworth Service Station: 168.7p a litre, 4.7 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about £1.80 of fuel to get there and back. Not worth the trip.
Mfg Havant: 168.9p a litre, 4.2 miles away. 0.8p a litre cheaper: saves 44p a tank, and costs about £1.61 of fuel to get there and back. Not worth the trip.
Park Lane Service Station: 169.9p a litre, 1.9 miles away
Mfg Morrisons Horndean: 169.9p a litre, 2.4 miles away
Sainsburys Farlington: 169.9p a litre, 2.7 miles away
Sainsburys Waterlooville: 170.9p a litre, 0.2 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.