Diesel crack hits record $99.125 a barrel as Ukraine strikes another Russian refinery

The diesel crack set a record at $99.125 a barrel yesterday, within striking distance of $100, after climbing more than 11% last week to $92.75, RBN Energy reported. That number is 264% above where it was a year ago. For anyone buying diesel at the rack, the math is ugly: refiners are capturing near-record margins on every barrel of distillate they make, and that cost lands on your invoice before it ever reaches the pump.

The crack is the spread between crude and the diesel refined from it. When it runs this wide, it means distillate is scarce relative to demand and refiners are getting paid to prioritize it. Branded and unbranded both feel it, though unbranded buyers with no supply contract to fall back on feel it first at spot.

The refinery strikes

Part of the tightness traces back to Russia. Ukrainian forces hit the TANECO refinery in Nizhnekamsk, Tatarstan overnight on August 20, setting a fire on the site, along with the Tamanneftegaz oil terminal in Kuban, the Ukrainian General Staff said. TANECO processes up to 16 million tons of crude a year and makes motor fuels, including supply for the Russian military.

These strikes don't take US barrels offline directly. What they do is pull Russian diesel exports out of the global pool, and a tighter global distillate market is exactly what's feeding a $99 crack. Watch whether the strikes keep landing, because a steady drumbeat on Russian refining keeps a floor under distillate margins.

Iran blockade

The US reinstated its blockade on Iranian oil exports in the Gulf of Oman after the July talks collapsed, and Bob McNally of Rapidan Energy told CNBC that Iran's volumes are now effectively irrelevant to global balances. Trump threatened what he called "tremendous" consequences for countries helping Iran.

Iraqi crude is still moving through the Strait of Hormuz, but at a fraction of the old volume. Marine Traffic counted 95 vessel crossings in the week to August 17, down from 118 the prior week. Chinese refiners are buying the barrels that do get out, snapping up 8 million barrels of Basrah Heavy and Medium for prompt delivery, Bloomberg reported. Less crude reaching refiners means less product, which is the same pressure showing up in the diesel number.

What to watch

Whether the diesel crack clears $100 and how long it holds there. If it stays wide, expect rack diesel to keep leading gasoline and margins on the buy side to stay thin. Watch the Hormuz crossing count for the next week, and watch whether Ukraine keeps hitting Russian refineries. Both could keep distillate tight into fall.