Petrol and diesel prices at Sainsburys Ashton Moss

Sainsburys Ashton Moss, OL6 7UB.

What it is charging

Unleaded: 167.9p a litre, 3.8p under the national average, filed Saturday 31 October
Super unleaded: 179.9p a litre, filed Saturday 31 October

Costco Wholesale Oldham: 163.9p a litre, 3.5 miles away. 4.0p a litre cheaper: saves £2.20 a tank, and costs about £1.30 of fuel to get there and back. Worth the trip.
Asda Ashton: 167.7p a litre, 0.6 miles away. 0.2p a litre cheaper: saves 11p a tank, and costs about 22p of fuel to get there and back. Not worth the trip.
Mfg Morrisons Dukinfield: 167.9p a litre, 1.4 miles away
Caroline Service Station: 167.9p a litre, 1.9 miles away
Asda Eastlands Supercentre: 168.7p a litre, 3.8 miles away
Droylsden Superstore - Petrol Filling Station: 168.9p a litre, 1.9 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.