Petrol and diesel prices at Blaire Garage Service Station

Blaire Garage Service Station, KA3 5AG.

What it is charging

• Unleaded: 171.9p a litre, 0.2p over the national average, filed Tuesday 27 October

Unleaded within 5 miles

• Mfg Morrisons Kilmarnock: 168.9p a litre, 4.8 miles away. 3.0p a litre cheaper: saves £1.65 a tank, and costs about £1.84 of fuel to get there and back. Not 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.