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US Diesel Hits Record High Amid Iran Conflict Costs

By Markets Desk · 2026-09-18 · 1 min read
A single gas pump nozzle resting on a concrete forecourt.
Illustration: Tradingbird

US diesel prices reached a record average of $6.40 on Thursday. President Trump frames these increases as a necessary cost for the ongoing war with Iran.

The national average price for diesel fuel hit $6.40 per gallon on Thursday. This marks the highest recorded average for the fuel. The national average for gasoline also stands above $4.40 per gallon.

President Donald Trump stated that these higher costs are a small price to pay. He linked the price increase directly to the military operations against Iran. The conflict has now passed the six-month mark.

Record Diesel Prices Defy Seasonal Trends

AAA data confirms the diesel price surge. Experts note that gas prices usually fall during this time of year. Summer driving demand is cooling and winter blend fuel is entering the market.

The current rise contradicts these historical patterns. The data from GN auto markets/energy: gasoline prices shows a sustained upward trend. Drivers face higher costs despite the seasonal shift in demand.

Presidential Rhetoric Links Fuel Costs to Security

Trump argued that preventing Iran from obtaining nuclear weapons justifies the expense. He described the price increase as inexpensive relative to the security gain. He suggested prices would drop rapidly once the war concludes.

The President expressed hope for the end of the war. He previously indicated openness to restarting talks with Iran. However, few signs suggest a deal is near.

Federal Reserve Rate Hike Draws Criticism

The Federal Reserve raised interest rates this week. This is the first increase since 2023. Chair Kevin Warsh, picked by Trump, led the decision.

Trump criticized the move, stating rates should be at 1% or less. He did not personally attack Warsh over the decision. This marks a departure from his previous feuds with former Fed chairs.

Based on reporting by WBTV, compiled by the Tradingbird desk.

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