Petrol and diesel prices at Asda Grantham Superstore

Asda Grantham Superstore, NG31 6NZ.

What it is charging

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

Great Ponton Fuel Express Automat: 168.7p a litre, 3.7 miles away. 1.0p a litre cheaper: saves 55p a tank, and costs about £1.41 of fuel to get there and back. Not worth the trip.
Sainsburys Grantham: 168.9p a litre, 0.7 miles away. 0.8p a litre cheaper: saves 44p a tank, and costs about 26p of fuel to get there and back. Worth the trip.
Mfg Archways: 169.9p a litre, 0.5 miles away
Mfg Somerby Hill: 169.9p a litre, 1.1 miles away
EG Grantham Pfs: 171.9p a litre, 0.3 miles away
Rontec ST Leonards: 172.9p a litre, 0.9 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.