The Disconnect Between Crude Oil and Diesel Prices

The core of the issue is the distinction between raw crude and the finished product. Diesel is manufactured, not merely extracted, and the "crack spread"—the difference in price between crude oil and its refined products—has ballooned to record levels. In mid-August, this spread topped $100 per barrel in the U.S., signaling that the market value of diesel is decoupling from the cost of the raw material. High profits for companies like Marathon Petroleum, Valero, and Phillips 66 have fueled accusations of manipulation, yet data suggests refineries are running at near-maximum capacity, often exceeding 98% utilization.

The Global Supply Crunch

The current price environment is driven by a series of compounding shocks rather than coordinated withholding. Ukrainian drone attacks have crippled Russian refining output, while conflict in the Middle East has constrained shipping through the Strait of Hormuz. Reuters estimates these combined disruptions have removed roughly 1.6 million barrels per day of diesel and gasoil from the global market. Domestically, while U.S. refining capacity has declined from its 2020 peak, the remaining facilities are operating intensely. The reduced capacity provides a thinner margin for error; when global disruptions occur, there are fewer spare facilities to absorb the shock. Consequently, even if crude oil inventories rise or prices soften, the fundamental shortage of refined diesel persists, keeping pump prices elevated until capacity is restored or demand cools.