Petrol and diesel prices at Gwalia Garage Caernarfon Limited

Gwalia Garage Caernarfon Limited, LL55 2SS.

What it is charging

• Diesel: 196.9p a litre, 1.8p under the national average, filed Thursday 22 October

Unleaded within 5 miles

• London garage service station: 169.9p a litre, 3.1 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.

Every forecourt in Caeathro