I remember it at 4/9d a gallon in about 1965,
I used to put four galls into my 350 AJS Model 16 and get change from £1.
Mind you . . I was only earning about £600 p.a. then, and half of that went to my mother for my keep
£1 went a long way in those days. I could survive for a week at Taunton Tech' on £1 for fuel and my lunches.
Bob.