Findings show 48 per cent of Kiwis prefer to stick to a 5km radius to find cheaper fuel prices, and for a good reason.
Travelling up to 5km from Auckland CBD meant a 16 cents per litre price difference on 91 Octane, the study found.
In Wellington driving up to 5km out of the CBD resulted in a price difference of six cents.
"Fuel costs are a real concern for drivers," Quantill said.
"According to our survey, the majority of people are spending up to $249 per month on fuel so savings of a few cents a litre can make a real difference to people's pockets."
Supermarket discount tickets and loyalty cards heavily influenced where petrol was bought, the survey also found.
Service station brand Challenge was rated as the top petrol brand by Kiwis for customer satisfaction. This was then followed by BP, Caltex, Gull, Z Energy, Mobil and Pak' N Save.