U.S. refineries have substantially altered their production mix during the first eight months of this year, with gasoline yields falling below 45% and marking new lows compared to the previous five-year performance. This represents a notable change from historical norms, when refineries typically produced between 45 and 50 barrels of gasoline per 100 barrels of crude oil processed.
The shift has been driven by significantly higher profit margins on diesel and jet fuel relative to gasoline, despite elevated gasoline prices. Production of distillate fuel oil, which encompasses diesel and heating oil, has exceeded its five-year average in every month through August. Jet fuel output has experienced an even more dramatic transformation, reaching over 12% of refinery output in March and maintaining that level through August, representing a record high share.
The reorientation of U.S. refining capacity reflects global supply pressures in the petroleum market. Military conflicts in the Middle East have disrupted refining operations in that region, while attacks on Russian refining infrastructure have further constrained diesel and other product supplies. Global refinery crude processing declined by 4.8 million barrels per day during the second quarter, and despite a partial recovery of 1.8 million barrels per day in the third quarter, throughput remained approximately 5% below year-earlier levels.
U.S. refineries have expanded crude processing by 500,000 barrels per day in both the second and third quarters, helping offset production losses elsewhere in the world. Diesel prices reached record nominal levels in September, underscoring the tight market conditions. For American refiners, the constrained global supply environment has created economic incentives to maximize production of middle distillates even at the cost of reducing gasoline yields, positioning the domestic refining system increasingly as a supplier to international markets facing acute shortages of these critical fuel products.
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