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Z Energy\'s Chief Executive is raising concerns over government monitoring of fuel profits. \\xa0
\\nThe Ministry of Business and Innovation releases weekly data that shows the margin retained on a litre of petrol.\\xa0
\\nIt 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
\\nBut Lindis Jones told Mike Hosking that it\'s not reflective of the margins they\'re seeing.\\xa0
\\nHe contends that in a ballpark figure, the margins are roughly half those quoted in the data.\\xa0
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