Canstar Blue's Emma Quantrill said fuel costs were a real concern for drivers.
"According to our survey, the majority of people are spending up to $249 per month on fuel but recent increases mean it doesn't buy as much gas as it did this time last year.
"For many people, there is no choice as to how often they use their car, for work, taking the kids to school, getting to medical appointments, etc."
Petrol was an extra pressure on motorist's budgets, she said.
A small fraction of respondents said they used public transport more now than a year ago, with the biggest jumps seen among Wellingtonians (19 per cent) and Aucklanders (16 per cent).
As petrol prices continue to climb, reaching as much as $2.45 per litre in the South Island, $2.51 on Waiheke and a whopping $3.11 on Great Barrier Island, it's possible price pressure could backfire for fuel companies, Consumer NZ boss Sue Chetwin said.
Fed-up motorists may simply opt for public transport, biking, or walking if filling the tank up became too expensive.
"Prices going up so strongly is not good from a consumer perspective, but it might encourage people to think differently about their transport," Chetwin said.