Diesel margins hit record highs as Gulf Coast crack spread doubles from a year ago
Diesel is where the money and the pain are this week. The Gulf Coast 3-2-1 crack spread averaged $65 a barrel in August, more than two and a half times its level a year ago, RBN Energy reported, as surging distillate cracks pulled refining margins up with them. For anyone hauling product or setting street prices at the pump, that number is the story.
Middle distillate cracks hit record highs, ING's commodities strategists Warren Patterson and Ewa Manthey wrote this week, driven by Russia's ban on diesel exports amid Ukrainian drone strikes on its refineries and fresh fighting around the Strait of Hormuz. Fewer barrels are moving. Kpler counted four tanker crossings of Hormuz on Tuesday against a ten-day average of 13. Crude followed: WTI was $91.05 and Brent $95.68 in early Wednesday trade, both up about $5 since US and Iran strikes resumed.
What it means at the rack
Wide diesel cracks mean rack prices stay firm even if crude wobbles, because the squeeze is in refining and distillate supply, not the barrel itself. Haulers and jobbers carrying diesel-heavy books get hit twice, once on the cost of product and once on the freight to move it. Farm buyers are already feeling it abroad, with diesel price surges flagged as a threat to farm margins as the new season starts. Domestic ag runs on the same distillate.
Labor Day made the retail side worse. Gas prices set records for the holiday weekend, per Springfield News-Sun and Audacy reports, alongside record airfare. High pump prices into September give c-store operators a margin question every morning: hold street price and defend fuel margin, or chase volume inside the store.
The refinery exemptions
EPA handed small refiners a break that will ripple through the RIN market. On Monday the agency granted small refinery exemptions worth 1.76 billion renewable fuel credits for the 2025 compliance year, full waivers to 18 refineries and partial to 11 more, and said it will propose reallocating those obligations to larger refiners in future years. The waivers came in larger than expected.
Refiners cheered it. Delek US Holdings welcomed the exemptions and the spending flexibility. Iowa's biofuel industry did not, warning about lost ethanol demand in a state that produced 4.6 billion gallons. For blenders and marketers, the near-term read is softer RIN obligations for the exempted barrels and an unsettled market until EPA spells out how it reallocates the rest.
The Venezuela claim
Energy Secretary Chris Wright said in Caracas that new deals with US and foreign companies could more than double Venezuelan crude output over the next few years, which he argued would pressure oil prices down. Trump tied it to lower gas prices. Industry experts told International Business Times it would not happen quickly, and Wright himself named the real bottleneck: refining capacity, not crude. None of this touches diesel supply this month.
What to watch
Whether Hormuz traffic recovers or stays thin, which sets the ceiling on how far cracks run. Watch for EPA's reallocation proposal, since that decides where the waived RIN obligations land. And watch whether record Labor Day pump prices ease after the holiday or hold into fall, because that is the number your customers see.