Petrol prices have fallen because of lower costs and a strong New Zealand dollar.
BP and Z Energy today dropped petrol prices by 2 cents a litre.
A litre of 91-octane petrol now costs 219.9c at their outlets, while premium costs 228.9c.
Z Energy said the price drop was because the international price for crude oil was down and the kiwi was up.
Automobile Association PetrolWatch spokesman Mark Stockdale said the AA had called for the price drop last week and was pleased the fuel companies had followed through.
"They've done exactly what we expected them to do."
Other companies were expected to follow suit today, he said.
Diesel prices are not expected to fall because the commodity price has not fallen.