Blimey Wigwam, that must have been around 1972 I reckon; that’s when I started driving. (First car Austin A35, reg. 5600AC – which is still about today.)
I paid £1, 2d. for 4 gallons at Jet near the Maypole, Birmingham.
Today £1.029 per litre at Tesco’s Evesham.
(Four gallons equals 18.184 litres – for £1. That’s 5.5p per litre.)