Petrol and diesel prices at Derrychrier services Ltd

Derrychrier services Ltd, BT47 4TB.

What it is charging

• Unleaded: 166.9p a litre, 4.8p under the national average, filed Wednesday 21 October

Unleaded within 5 miles

• Dungiven Centra: 159.9p a litre, 0.6 miles away. 7.0p a litre cheaper: saves £3.85 a tank, and costs about 21p of fuel to get there and back. Worth the trip.
• Eurospar Dungiven: 159.9p a litre, 2.0 miles away. 7.0p a litre cheaper: saves £3.85 a tank, and costs about 72p 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.