The sharp fall in oil prices is set to continue benefiting consumers but could delay exploration projects around New Zealand.

Air New Zealand chief executive Christopher Luxon expects low oil prices to stimulate demand for travel but for their beneficial effect on the airline's fuel bill to be muted by the fall in the New Zealand dollar.

Lower fuel prices are compounding the longest commodity slump in a generation.

Lower petrol prices contributed to a 0.1 per cent fall in the amount consumers charged to electronic cards last month.

Qantas boss Alan Joyce says fuel prices falling more quickly than the Australian dollar are helping revive the airline's international division but he's not putting a date on when it will be out of financial trouble.

New Zealand-founded LanzaTech's quest to commercialise its biofuel has taken another step with one of the world's biggest banks.

Z Energy boss Mike Bennetts says the return of $2 a litre petrol could be on the cards if oil prices continue to plummet.

The immigration surge continued to gather pace last month, with the net inflow of 4270 people the second-largest monthly gain on record.

How's this for fuel economy? A Mercedes has travelled 1968 kilometres from North Africa to England without having to refuel - and still had another 160km in it.

Motorists should brace themselves for petrol rising another three cents per litre, while drivers of light vehicles run on diesel will face about a 10 per cent rise.

Entrants in the annual EECA Awards being presented tomorrow can claim credit for energy savings equivalent to the annual power use of two Hamilton-sized cities.

A service station was forced to close when a driver was allegedly attacked by those he was transporting after an argument over who would pay.

Petrol prices are heading down towards the $2 mark with BP announcing a 3c price cut today as international oil prices tumble.

Kiwi motorists have adjusted to higher fuel prices and are getting back behind the wheel, statistics show.

Gull has slashed 10c a litre off the price of petrol for the remainder of Easter, putting pressure on the bigger fuel companies.

The major oil companies say they are monitoring dropping commodity prices daily.

The Automobile Association believes motorists have good reason to feel ripped off when they fill up with gas.

The Government has been accused of being a Christmas Scrooge and increasing petrol prices in order to protect its promise to get back into surplus in 2014-15.