Oil Is $105. Why Is Diesel $6.29?

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The familiar 50–30–20 rule helps explain a fuel bill—but not who is profiting from today’s energy shock. When drivers see a higher number at the pump, the explanation usually begins with crude oil. A familiar rule of thumb assigns roughly half of the retail price to crude, about 30 percent to refining, and the remainder to distribution and retailing. That is a useful starting point. But it is not a fixed formula—and certainly not a division of profits. In May 2026, the U.S. Energy Information Administration attributed 51.9 percent of the price of regular gasoline to crude oil, 21.7 percent to refining, 14.8 percent to distribution and marketing, and 11.5 percent to taxes. Those shares move substantially from month to month. They describe components of the retail price, not the net income retained by each participant. The distinction matters because today’s energy shock is occurring not only at the oil well, but also at refineries, shipping routes and fuel-storage terminals. 1. The Price of Crude Is Only the Beginning The EIA expects Brent crude to average about $105 a barrel in the fourth quarter of 2026. In September, U.S. gasoline averaged $4.35 a gallon and diesel $6.29. But crude alone does not explain the unusually high diesel price. A barrel of oil is not yet gasoline, diesel or jet fuel. It must reach a functioning refinery, be converted into the required products and then transported to the markets that need them. Each step has become less reliable—and more expensive. That means the question is no longer simply, “How much does oil cost?” It is also: Can the available oil be refined into the right fuel, in the right place, at the right time? 2. Refining Has Become the Bottleneck The International Energy Agency reports that refining margins reached record levels in the Atlantic Basin in August, driven largely by a shortage of diesel. Disruptions in the Middle East and Russia reduced exports of refined products more severely than crude flows themselves. This helps explain why fuel prices can rise faster than crude prices. When refinery capacity or refined-product exports become scarce, the gap between crude prices and wholesale fuel prices—the “crack spread”—widens. Refiners capable of operating reliably can earn unusually high margins. But this does not automatically prove abusive profiteering. A high margin is also a market signal encouraging refiners to maximize production and redirect supplies toward shortage areas. The harder question is whether those margins reflect unavoidable scarcity, insufficient competition, strategic underinvestment—or some combination of all three. 3. Risk Has Become Part of the Product Consumers are now paying for more than petroleum and processing. They are also paying for war-risk insurance, tanker scarcity, longer shipping routes, security escorts, delayed cargoes and depleted inventories. These costs are real, but they are not shared equally. Oil producers may benefit from higher crude prices. Refiners may capture wider processing margins. Shipowners and insurers may receive larger risk premiums. Retailers, however, do not necessarily gain: the EIA says U.S. retail and distribution margins have been depressed during 2026 because wholesale prices rose too quickly to be passed through immediately. Ultimately, households and businesses absorb much of the shock through higher transportation, heating and goods-delivery costs. The old 50–30–20 shorthand therefore conceals as much as it reveals. The important issue is not merely how the pump price is divided, but which part of the supply chain has become scarce, who has pricing power there, and whether the resulting premium represents cost, risk or economic rent. Questions for Discussion 1. When refining margins reach record levels during a supply crisis, how should we distinguish a necessary scarcity signal from excessive market power? 2. Should governments focus on releasing crude reserves, or would strategic reserves of diesel and other refined products be more useful in this kind of disruption? 3. Who should ultimately bear geopolitical risk—the energy industry, taxpayers or consumers—and how transparent should that cost be? A serious energy debate must move beyond blaming either oil producers or retailers alone. Today’s fuel price is the outcome of an entire system under stress. Understanding where the bottleneck lies is the first step toward deciding who should pay to make that system more resilient. Sources: U.S. gasoline price components—EIA · October 2026 Short-Term Energy Outlook—EIA · September 2026 Oil Market Report—IEA Photo credit Cover photo: An oil refinery in Rosemount, Minnesota, photographed by Tom Fisk via Pexels. Our sincere thanks to the photographer for creating and generously sharing this image.