Like the stuff itself, petrol and diesel prices are volatile. And whether you drive or not, your life is affected by them. When the cost of a litre started to skyrocket some years ago, freight organisations and drivers groups said it couldn't go on.
Well it hasn't - and much to many people's surprise, petrol's almost below a pound a litre - and according to the boss of Shell, prices will stay low for months. But what does this mean for companies, and consumers, around the south-east? David Johns has been finding out.