KEY POINTS
  • In the tit-for-tat tariff war with the U.S., China said last week it would put tariffs on U.S. oil imports.
  • As the world's largest importer of crude, China could tilt the scales in determining how much Iranian crude will be taken off the world market.
  • Oil customers have been scrambling to replace Iranian barrels because of the financial restrictions President Donald Trump has put on companies that would deal with Iran.
  • That shifting of oil supply is an issue at the heart of debate at this week's OPEC meeting.

The U.S. trade dispute with China, in a roundabout way, could determine how successful the U.S. will be in sanctioning Iran's oil this time around — and that uncertainty is also playing out at OPEC.

In the tit-for-tat tariff war with the U.S., China said last week it would put tariffs on U.S. oil imports. The U.S. is not a major oil exporter, but it has been growing exports and is exporting about 2 million barrels a day of crude. About 300,000 barrels of that heads to China each day, and China could stop those purchases depending on how the trade dispute develops with the U.S., according to Scott Sheffield, executive chairman of Pioneer National Resources.