Oil has been on a bull run after months in the doldrums, pushing up prices at the pump.
In New Zealand, petrol companies have steadily been increasing petrol and diesel prices for the past two weeks, and Z Energy and BP put them up again yesterday, even though the price of oil dipped to be trading at US$48.04 a barrel.
During the past two weeks, fuel prices across all companies have increased at least four times as oil staged a rally on world markets. Z and BP put the price of 91 octane up 3c to a nationwide average - before discounting - of close to $1.88 a litre.
Despite yesterday's dip the price of oil has surged 16 per cent this month.
This is from a low point of less than US$30 a barrel earlier this year but still well below highs of more than US$100 within the last two years.