Z Energy's Chief Executive is raising concerns over government monitoring of fuel profits. \xa0
The Ministry of Business and Innovation releases weekly data that shows the margin retained on a litre of petrol.\xa0
It shows on regular 91, the margin made by fuel importers has risen from 33 cents to 52.4 cents a litre in the past three weeks. \xa0
But Lindis Jones told Mike Hosking that it's not reflective of the margins they're seeing.\xa0
He contends that in a ballpark figure, the margins are roughly half those quoted in the data.\xa0
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