With the global economy grinding to a sudden halt because of the Covid-19 pandemic, oil prices are going through the floor with suppliers fast running out of room to store the stuff. That’s terrible news for oil producers the world over, particularly in countries who rely on hydrocarbon handouts to keep regimes afloat. But if you’re dreaming of free fill-ups, don’t hold your breath. It might not be such great news either for cash-strapped consumers: for one, much of the price at the pump is tax and it will only fall so much.