$140 a barrel is the effective oil cost facing the world economy, even with crude near $100, because refining shortages have pushed the crack spread above $65 from about $25 before the war.
That squeeze has intensified as the Iran conflict drags on: a second Strait of Hormuz closure threatens supply again, Red Sea attacks endanger Saudi bypass routes, and depleted inventories no longer cushion disruptions.
Diesel prices are already near prior peaks, showing end users are paying far more than headline crude prices imply because limited refining capacity is bottling up usable fuel supply.
Higher energy costs threaten to reverse last month's inflation easing, lift interest rates and deepen pressure on households and businesses, with 10-year Treasury yields already rising on expected Fed tightening.
The risk could worsen if Washington escalates further; the Wall Street Journal said Trump is in "revenge mode" and the U.S. military is sending more forces to the Middle East.
Can the world handle simultaneous threats to Hormuz, Bab el-Mandeb, and refining capacity without a wider inflation shock?
If oil is near $100, why are drivers and airlines feeling something closer to $140 oil?
Is the real danger in the US-Iran war no longer crude supply, but the hidden collapse of fuel delivery routes?
The 2026 Strait of Hormuz Blockade: Global Energy Crisis, Refining Margin Shock, and the Fracturing of OPEC
Overview
In July 2026, renewed tensions between the United States and Iran led to the blockade of the Strait of Hormuz, crippling major refineries in the Gulf and causing a sharp drop in global refined petroleum output. This supply shock triggered a historic refining margin crisis, with diesel and jet fuel shortages pushing crack spreads to record highs. As refiners prioritized diesel and jet fuel over gasoline, gasoline supplies tightened further, driving up prices for consumers and the logistics sector. The crisis exposed deep vulnerabilities in global energy infrastructure and highlighted the far-reaching economic and operational impacts of chokepoint disruptions.