Oil's rise to $US80 a barrel is stoking concerns that the price rally will erode demand, but OPEC's giants so far aren't worried.
Crude surged above $US80 a barrel in London for the first time since 2014, as global supply tightens and the US moves to restrict oil exports from Iran.
"At $US80 per barrel, there will be some impact on demand," warned Patrick Pouyanne, chief executive officer of French oil explorer Total. The problem could worsen if Iran's exports are curbed later this year.
"I wouldn't be surprised to see $US100 per barrel in the coming months," he said in Washington on Thursday (Friday AEST).
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