U.S. Diesel Futures Jump 26% in July as Refined Fuel Shortage Eclipses Crude Concerns
Shrinking SPR reserves, crippled Saudi Red Sea exports, and strained Asian refinery feedstocks are shifting the oil crunch from barrels to products.
U.S. wholesale diesel futures have surged 26% so far in July (2026-07-29), a move that signals the current Middle East supply disruption is biting hardest not at the crude level but downstream, in refined products markets that traders have less room to buffer.6
The crude headlines have focused on route closures and tanker attacks, but the product squeeze is where physical tightness is most acute. U.S. Strategic Petroleum Reserve stocks fell to 316 million barrels by mid-July (2026-07-15), their lowest level since 1983, leaving the government with far less room to absorb further drawdowns than in prior crises. At the war's start, the SPR held roughly 414 million barrels. It has shed nearly 100 million barrels since.3
IEA executive director Fatih Birol said during the week of July 20 (2026-07-20) that "there is no room for complacency on oil security amid the escalation in hostilities and a continued drawdown of available commercial stocks" — a rare direct warning from an agency that typically measures its language carefully.6
The supply backstop was already thin before the latest escalation. When Iran first closed the Strait of Hormuz, global oil storage held roughly 8.4 billion barrels — but J.P. Morgan estimated only around 800 million of those barrels were accessible without straining physical infrastructure. Since the conflict began, observable global stocks have fallen by a cumulative 246 million barrels: a 129 million-barrel draw in March followed by another 117 million-barrel decline in April, equivalent to roughly 3.9 million barrels per day, according to earlier estimates.3,1
Saudi Arabia's export rerouting has compounded the tightness. After redirecting virtually all crude exports through its East-West pipeline to Yanbu on the Red Sea, Saudi loadings from that terminal have since collapsed. By June, Yanbu shipments had dropped to approximately 2.39 million barrels per day — down 41% from the March peak and 66% below the January combined export level of about 7.96 million barrels per day across both Gulf and Red Sea terminals.5
Brent crude futures spiked above $100 a barrel on July 23 (2026-07-23), up over 6% on the day, after Yemen's Houthis said they struck two Saudi oil tankers, extending the disruption across both the Red Sea and the Strait of Hormuz. ICE Brent front-month was trading at $87.07 per barrel by early Wednesday (2026-07-29), reflecting some pullback but remaining elevated relative to pre-escalation levels.4
The crunch is not uniform across regions. Asian refiners outside China are running at roughly 80% utilisation, but that rate is expected to fall by end-August as crude delivery delays from the Middle East reduce feedstock availability, according to analysis cited by oilprice.com (2026-07-28). Global refinery crude runs in 2026 are now expected to average around 82 million barrels per day, nearly 1.6 million barrels per day below 2025 levels.6,1
European aviation faces a specific exposure. Around 75% of Europe's jet fuel imports originate from the Middle East Gulf, meaning Strait of Hormuz disruptions translate directly into jet fuel supply pressure rather than just crude price volatility. That supply chain compression tends to move product crack spreads before it shows up in headline crude benchmarks.1
The commercial inventory drawdowns during the second quarter of 2026 (2Q26) illustrate how fast buffers erode under sustained disruption. EIA data released on Wednesday June 17 (2026-06-17) showed commercial crude inventories fell 8.3 million barrels in a single week, while the SPR shed a further 8.9 million barrels in the same period — a dual drawdown that offered no offset from either buffer.2
Goldman Sachs expected oil prices to retain most of their recent gains through July and August, supported by lower Middle East production and seasonal summer travel demand, according to reporting after the July 23 (2026-07-23) price spike. ICE Brent front-month at $87.07 on Wednesday (2026-07-29) sits well below that $100 intraday print, suggesting some of the acute risk premium unwound — but diesel futures have not followed crude lower with the same speed.4
The forward risk concentrates at Bab el-Mandeb. If the Houthis move to a declared naval blockade of that strait, Asian buyers would lose a major crude supply artery that cannot be easily substituted, particularly given the already-compromised Hormuz corridor, according to analyst commentary cited by oilprice.com (2026-07-28). Asian refiners cutting run rates by end-August would then arrive precisely as their crude pipelines thin further — a timing problem that heating oil futures at $4.26 per gallon on Wednesday (2026-07-29) already partly reflects.6,5