The golden run of cheaper petrol could be at an end with prices at the pump increasing for the first time in four months, AA says.
All fuels have increased by 4 cents per litre, which AA PetrolWatch spokesman Mark Stockdale said was "a bit on the nose".
The blame could be placed on the low New Zealand dollar, which had fallen 5c in the past fortnight to the lowest level since September 2010, he said in a statement on the company's website.
"Commodity prices have also risen for the first time since August, which suggests the long run of reductions are over."
Margins had now fallen to levels last seen in April last year, which meant fuel companies had passed on all of the commodity price reductions, Mr Stockton said.