Oil jumps 6% to $78 Brent as US-Iran strikes turn tankers back from Hormuz
Crude spiked 6% Wednesday after the US and Iran traded fresh military strikes overnight, with Brent at $78.58 and WTI at $74.76. At least four oil and LNG tankers made U-turns from the Strait of Hormuz in the past 12 hours, per vessel-tracking data compiled by Reuters, after Iran hit three commercial ships off Oman on Tuesday, including an oil tanker and an LNG carrier. The US also canceled its sanction waiver for Iranian crude in response. For anyone hauling product or setting street prices, that is the number that matters this week: the spot market repriced on fear of a real chokepoint disruption, and gasoline is likely to move up behind it.
The mechanics are simple. Hormuz carries a fifth of the world's seaborne oil, and when tankers stop transiting, the barrels that clear the strait get bid up regardless of what US inventories look like. Wholesale racks track the crude curve within days, so jobbers who bought forward last week are sitting fine, and those who didn't are buying into strength. President Trump saying the Iran ceasefire is "over" gave the tape no reason to settle.
Year-round E15
Legislation moving through Congress could remove the summer ban on E15, letting the 15% ethanol blend sell in most states without a federal RVP waiver. Iowa corn and soybean grower Mark Recker, who has pushed for year-round E15 for about 20 years, said "this looks like something that could really happen." For c-store operators, permanent E15 clears up the annual scramble over which pumps can dispense what between June 1 and September 15. It also gives retailers with blender pumps a cheaper octane option to sell while crude runs hot. Watch whether this clears both chambers before the summer driving season closes, because a mid-season rule change makes it harder for retailers to plan.
Diesel pressure
Ukrainian long-range drones hit two Russian refineries overnight, part of a campaign that has now reached targets up to 3,000 km from the front and knocked out what reports called Russia's largest refinery. StoneX flagged that these strikes are quietly pushing diesel costs higher. The US does not import Russian diesel, but distillate is a global barrel, and every ton of Russian refining capacity offline tightens the pool that European buyers draw from, which pulls on Gulf Coast exports. Diesel margins were already firm. Add a war premium on crude plus lost refining runs abroad, and haulers should expect their fuel line to climb before it eases.
One steadying note: US fuel consumption is running at record levels, per aftermarket demand data, so at least the volume is there to move even as the cost of moving it goes up.
What to watch
Whether tankers resume transiting Hormuz is the whole question on crude. If the strait reopens and traffic normalizes, prices could ease back as fast as they ran up. If more vessels turn back, the risk premium builds. On diesel, the pace of Russian refinery outages and how long each unit stays down will set how much of that cost reaches US racks. And keep an eye on the E15 bill's floor schedule. A clean summer sale rule would be one less thing to manage heading into the back half of the year.