Fuel refining margins hit record highs as Brent returns to $76.60 on renewed U.S.-Iran fighting
Refining margins for gasoline and diesel jumped to record highs this week, according to OilPrice.com. The two drivers doing the work are Russia's ban on diesel exports and shrinking global fuel inventories, with the re-escalation between the United States and Iran layered on top. Crude is well off its wartime peak, but the margin refiners are taking on top of crude is not, and the rack price you pay reflects both.
Crude did most of its work weeks ago. Brent traded at $76.60 a barrel and WTI at $72.37, both up on the week but only modestly, after four weeks of decline that took benchmarks back to pre-war levels and below. Crude traders are not pricing the renewed fighting as a supply loss. Product prices are climbing anyway.
Russia's diesel ban
Moscow's export ban is doing more to the distillate curve than anything happening in the Persian Gulf. Europe is short diesel, and a short Europe pulls Gulf Coast cargoes east, which tightens what is left for domestic racks.
The refineries themselves are targets. Ukrainian drones struck a Russian refinery, an oil terminal, and an optomechanical plant, with fires reported at the Moscow Oil Refinery in the Kapotnya district of the city. Damage to refineries and loading terminals limits how much crude Russia can process and how much product it can move out.
The IEA's surplus call
The IEA said Friday that this week's renewed U.S.-Iran hostilities could flip its outlook for an oil market surplus. The warning came even though oil flows through the Strait of Hormuz have tentatively recovered and global stocks posted their first build since the war began.
That projected surplus has been the main thing holding crude down. If the IEA walks it back, the floor under Brent could move up, and forward diesel contracts could follow.
Record U.S. crude output
The United States produced more crude oil than any other country in 2025, per EIA's International Energy Statistics, extending a run that started in 2018 when U.S. output passed Russia's. The output record does not help with the tightness this week. Record crude production does not relieve tight refining capacity or low product inventories, and that is where the squeeze is.
What to watch
Whether the diesel crack holds at these levels once the Hormuz flows firm up, or whether it has been pricing war risk that crude has already given back. Watch the next round of drone damage assessments out of Russia, since that determines how much supply the export ban actually removes. And watch whether the IEA formally revises the balance. If the surplus goes away on paper, a hedge you skipped in June could get expensive to put on later.