U.S. diesel crack margins punched through $100 a barrel in August and touched an all-time high above $106-$108 last week, but the bottleneck is refining capacity, not crude supply. Fresh inventory data shows the first real relief in distillate stocks even as WTI holds the $97 handle and Brent trades back above $100.
Refining capacity, not crude, is the bottleneck
Diesel's record run is not really about oil supply. Refineries built to maximize distillate output were shut worldwide and never replaced, and that lost capacity is now the constraint on the product market rather than crude itself.
The shortage was exposed by Ukrainian strikes on Russian refineries and disruptions tied to the Strait of Hormuz. Russia, once a major diesel exporter, has banned diesel exports, and its plants keep getting hit — sources say key units halted at Rosneft's Ryazan refinery after a September 6 drone strike. Energy Secretary Chris Wright has said refining, not crude oil output, is now the bigger problem behind elevated gasoline and diesel prices.
Distillate stocks post their first build
The American Petroleum Institute's data for the week ending September 4 gave the diesel crack its first relief valve. Distillate inventories rose 2 million barrels, after a 300,000-barrel draw the prior week. Stocks remain roughly 14% below the five-year average. Gasoline moved the other way: stocks fell 1.9 million barrels after no change the week before, keeping that product tight even as crude firmed.
Crude itself undershot expectations. Inventories declined just 300,000 barrels versus a forecast 1.3-million-barrel draw. Cushing stocks fell 300,000 barrels after a prior-week build. The 3-2-1 crack has been holding in the mid-$60s per barrel, with diesel still doing most of the work while gasoline gives some of it back.
Product tightness, especially in diesel, is still driving the complex more than the crude print. A confirmed distillate build in today's official EIA data would likely pull the diesel crack further off its highs, while gasoline stays supported.
Source: Investing.com
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