Why does diesel fuel cost up to eight pence per litre more than petrol? It features a lower fraction of the crude oil from which it is made, requires less processing and is used in volume by commercial vehicles, so should be cheaper.
It is also heating oil. Less of it can be refined from a barrel of crude than petrol, unless you employ some extremely expensive refining processes. The economics of supply and demand then decide the price.Picture: CLARA MOLDEN