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As petrol prices routinely break the $3-per-litre barrier, focus has returned to the way fuel costs are set around New Zealand - and it's highlighted one of the nation's great mysteries.
Northland reporter Peter de Graaf explains.
Listen
As petrol prices routinely break the $3-per-litre barrier, focus has returned to the way fuel costs are set around New Zealand - and it's highlighted one of the nation's great mysteries.
Northland reporter Peter de Graaf explains.