The global oil market might be running on fumes. Drone strikes have forced Saudi Arabia to shut its 4 million barrel-a-day East-West pipeline, leaving the Yanbu export terminal on the Red Sea with crude to sustain shipments for “just five to seven days,” Reuters reports.

• Marathon Petroleum shares are testing new highs. Why is MPC stock breaking out?

The route had allowed Riyadh to sidestep the Strait of Hormuz, which has slowed to 6 million to 9 million barrels a day, while Houthi fighters seized an island at the mouth of the Red Sea, threatening Bab el-Mandeb as well.

The collision is structural. Saudi output fell to 6.2 million barrels a day in August from 10.9 million in February, and world stockpiles have shrunk by roughly 400 million barrels this year. That fragile supply picture is meeting a U.S. downstream sector with no flexibility left.

With neither crude routes nor domestic refining carrying spare buffers, the next price move is likelier to resemble a cliff than a climb.

The Midstream Choke Point

Yanbu’s roughly 35-million-barrel storage is draining, and one source told Reuters that repairs “could take as long as five to six weeks.” Saudi stocks held at Egypt’s Ain Sukhna and Sidi Kerir terminals can supply customers for only “several days.”

Stocks “will ultimately run out without the east-west pipeline resuming operations,” sources said, erasing the kingdom’s workaround for Gulf transit risk.

Upstream scarcity is bleeding into products. Brent briefly exceeded $111 a barrel, as the International Energy Agency forecast a 5.7 million barrel-a-day decline in world supply this year. Foreign buyers are pulling barrels out of the U.S., with early-August distillate exports near a record 1.9 million barrels a day, according to Reuters estimates, draining domestic stockpiles already 13% below the five-year average.

The macro spillover is stagflationary. Record fuel prices are stoking global inflation and pressuring bond yields to levels not seen since the Great Recession.

The Refining Paradox

The large domestic issue is the lack of headroom. Relief cannot come from domestic processing as U.S. refineries ran at 97.8% of capacity with crude inputs of 17.6 million barrels a day, according to the Energy Information Administration.

“A $100/bbl crack makes a refinery much more profitable, but it does not make the crude unit or hydrocracker any bigger,” RBN Energy Senior Analyst Liz Decken noted.

Once margins clear marginal cost, refiners are already running flat out; stronger incentives yield almost no additional throughput.

This bottleneck creates a deceptive setup for merchant refiners such as Valero Energy (NYSE:VLO) and Marathon Petroleum (NYSE:MPC). The former is up about 143.60% year-to-date, and the latter has gained 151.44% in the same period.

While headline diesel crack spreads have touched records of $108 a barrel, actual net capture is eroded by roughly $15 a barrel in Renewable Identification Number compliance costs, along with elevated natural gas and operating overhead.

Seasonality and Your Pantry

Finally, elevated diesel prices risk severe consequences due to seasonality. The late-summer and autumn harvest season represents an inflexible demand window. It’s a period of the year when farmers have no choice but to be price takers and avoid risking crop spoilage and harvest delays.

Eventually, those risks ripple through both sides of the supply chain — compressing farm income, delaying capital expenditure, and reducing forward demand for agricultural machinery and fertilizers — and eventually end up in the retail consumer’s pocket in the form of higher food prices.