Oil Prices Retreat as Trump Weighs Iran Deal and Diesel Relief Measures Struggle to Lower Costs

Oil prices moved lower Monday morning as President Donald Trump signaled that the United States could pursue a diplomatic agreement with Iran rather than immediately resume military strikes. West Texas Intermediate (WTI) futures declined more than $2/bbl to approximately $101.19/bbl, while Brent traded near $114.82/bbl, down $1.90/bbl. Despite Monday's decline, crude prices remain near six-month highs following attacks on Saudi Arabian energy infrastructure and continued disruptions to Middle East shipping. Meanwhile, U.S. diesel prices remain elevated despite several administration measures aimed at reducing fuel costs ahead of the November midterm elections.

Trump said Sunday that it was approaching "decision time" on whether Washington would reach an agreement with Iran or resume military operations. Diplomatic efforts continued Monday as senior officials from Saudi Arabia, Turkey, and Pakistan prepared to meet Iranian leaders in Tehran. Qatari mediators also traveled to Iran to pursue de-escalation in coordination with the United States. These developments contributed to lower crude prices, as the prospect of reduced hostilities raised expectations of improved regional oil flows.

However, attacks on Saudi Arabian infrastructure continued over the weekend. Houthi forces claimed strikes on pumping stations along Saudi Arabia's East-West crude pipeline and Riyadh's airport, while Saudi Arabia intercepted additional missiles and drones. The pipeline provides an alternative export route that bypasses the Strait of Hormuz, making continued attacks a concern for global crude availability. According to Reuters, October has recorded the highest number of commercial shipping attacks in and around the Strait of Hormuz since maritime security tracking began in 2017.

Physical crude markets are also adjusting to changing supply conditions. Iraqi Basrah Medium crude was sold at a discount of nearly $10/bbl to the Dubai benchmark during a ship-to-ship transfer in the Gulf of Oman. Meanwhile, crude held in floating storage increased 8% over the past week to 87.42 million barrels, reflecting continued challenges moving some supplies through traditional trading routes.

While crude prices eased, U.S. diesel costs remain elevated. According to the Energy Information Administration (EIA), the national average retail diesel price increased by nearly 10 cents per gallon to $6.28 per gallon in the latest reported week. The Trump administration has responded by easing restrictions on Russian fuel imports, announcing $8 billion in agricultural assistance, and temporarily relaxing certain requirements for red-dyed diesel used in highway vehicles.

Trump's red-dyed diesel policy has yet to deliver meaningful savings for fuel buyers. The federal diesel tax remains in place, with the IRS only suspending certain reporting requirements and penalties through the end of the year. Truck stop operators remain hesitant to adopt the changes without clearer guidance on their tax obligations. Farmers are also waiting for relief, as the administration's $8 billion aid package is not expected to reach them until after the November 3 election. Meanwhile, a tanker carrying approximately 320,000 barrels of Russian ultralow-sulfur diesel departed Thursday and intermittently listed New York as its destination. If the shipment arrives, it would be the first Russian diesel delivery to the United States under the recent agreement between Trump and Putin.

Russian diesel imports could bring additional fuel into the United States, but supplies remain tight across major global trading hubs. Persian Gulf crude exports have recovered to near their 2025 average, while diesel and other refined product shipments continue to lag. Goldman Sachs expects these shortages to extend into 2027 as refineries catch up on maintenance postponed during this year's unusually light fall maintenance season. With more refinery downtime scheduled for the second quarter of 2027, diesel production could face further interruptions. For U.S. fuel buyers, this means crude prices could continue to fall without diesel prices falling at the same pace.