It will affect punters who like to travel a lot. Say you want to go forty or fifty kilometres to visit a certain provider. If fuel hits even "only" 2.45 or 2.55 a litre that will hurt a lot of people.

And a shortage of diesel in particular obviously affects farmers and transport. Grocery/food prices could skyrocket.

Might be time soon for more localised punts, and shops and independent gals will have to discount obviously if the SHTF in a serious way