Tauranga motorists are being advised to keep an eye out for lower fuel prices.
Service stations in parts of the North Island are discounting petrol costs, in some cases, 91 octane petrol is being retailed for $1.60 per litre, more than 30 cents below average.
"New Zealand does not have a single national fuel price, and with most service stations being independently-owned, the owners can set their own price," said AA PetrolWatch spokesperson Mark Stockdale in a statement.
"Even company-owned stations will adjust prices locally to match competition," he said.
After prices climbed 16 cents per litre during February, petrol continued to rise during March before falling later in the month, ending on $1.92 per litre for 91 octane at most outlets.