Petrol prices could be set to soar as high as $3.50 a litre with the cost of oil at its highest point in a year.
Brent Crude is edging towards $95 US per barrel. And S and P Global oil analyst Spencer Welch told the BBC, it could go even higher.
And with Chinese refineries slowing down their output, there's a strain in other parts of the supply chain, too.
Waitomo managing director Jimmy Ormsby spoke to Ingrid Hipkiss.
