Rownhams West Mwsa, SO16 8AP. A motorway service area, where you have no choice.
What it is charging
Unleaded: 198.9p a litre, 27.2p over the national average, filed Friday 23 October
Diesel: 222.9p a litre, 24.2p over the national average, filed Friday 23 October
Super unleaded: 216.9p a litre, filed Tuesday 20 October
Super diesel: 240.9p a litre, filed Wednesday 21 October
Unleaded within 5 miles
Costco Wholesale Southampton: 165.9p a litre, 2.9 miles away. 33.0p a litre cheaper: saves £18.15 a tank, and costs about £1.09 of fuel to get there and back. Worth the trip.
Southern Co-op Romsey Winchester Hill: 169.9p a litre, 2.9 miles away. 29.0p a litre cheaper: saves £15.95 a tank, and costs about £1.11 of fuel to get there and back. Worth the trip.
Manor: 169.9p a litre, 4.1 miles away. 29.0p a litre cheaper: saves £15.95 a tank, and costs about £1.58 of fuel to get there and back. Worth the trip.
Mfg Northam: 169.9p a litre, 4.2 miles away. 29.0p a litre cheaper: saves £15.95 a tank, and costs about £1.62 of fuel to get there and back. Worth the trip.
Eastleigh Service Station: 169.9p a litre, 4.3 miles away. 29.0p a litre cheaper: saves £15.95 a tank, and costs about £1.66 of fuel to get there and back. Worth the trip.
Queensway Service Station: 169.9p a litre, 4.4 miles away. 29.0p a litre cheaper: saves £15.95 a tank, and costs about £1.69 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.