Wellington - Big oil companies were cleared of suspicion of running an illegal anti-competitive cartel in an independent investigation into New Zealand petrol pump prices released Thursday.
The report showed that the New Zealand petrol market was "fundamentally competitive," said Commerce Minister Lianne Dalziel, who commissioned the study after angry motorists' complaints about a 30-per-cent increase in prices within five months.
The price of the most popular 91-octane petrol reached 2.18 New Zealand dollars (about 1.57 US dollars) a litre last month in New Zealand cities, a rise of 60 per cent since January 2007.