A US oil export ban seems logical during a crisis, but it's counterproductive. American refineries are primarily configured for heavier crude oil, while the US shale revolution produces lighter crude that must be exported. Not all oil is fungible, making global trade essential for domestic refining.

The “energy weapon” is not limited to adversaries. The U.S. Energy Secretary has confirmed that all options, including export controls on refined products, are being considered to manage domestic consumer prices. This move would weaponize America's energy superpower status with significant global consequences.

A potential US diesel export ban has a cynical, second-order strategic purpose. By cutting off supply to Europe, the US could inflict enough economic pain to force its allies to pressure Ukraine into a settlement with Russia, achieving US policy goals through indirect economic coercion.

A ban would quickly fill diesel storage, forcing refineries to cut overall production. Because refineries produce a fixed mix of fuels, this would also reduce gasoline output. In a balanced market like the U.S., this would create a gasoline shortage and drive its price higher.

The global energy crisis is misunderstood. There is ample crude oil; the critical shortage is in refining capacity, especially for medium-sour crude needed for diesel. This means prices for gasoline and diesel can skyrocket due to refinery constraints, even while crude oil prices remain stable.

The US primarily produces light crude oil, but its refineries are configured for heavier crude. The country exports its light crude and imports heavy crude to match its refining capacity. An export ban would create a massive mismatch and strand domestic production.

Tightness in the global diesel market is creating a powerful economic incentive for U.S. refineries to maximize diesel output. This forces them to deprioritize gasoline production, a highly unusual move right before the summer driving season. This production shift, combined with high exports, is rapidly draining U.S. gasoline inventories.

A potential 90-day US diesel export ban is not just a flawed economic policy but a strategic weapon. It could create global shortages, enabling the administration to selectively grant exemptions to allies who "kiss the ring," thereby enforcing loyalty and consolidating its geopolitical influence.

While banning US oil exports would initially crash domestic prices, it would quickly cause an overflow of products like diesel in the Gulf Coast. Refineries would then be forced to cut production, ultimately creating shortages of other fuels like gasoline on the East Coast and disrupting the entire system.