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Diesel Hits Record High as US-Iran Conflict Persists

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

US diesel prices reached a historic peak of $6.40 per gallon on Thursday. President Trump argues the cost is justified by the ongoing military conflict with Iran.

US diesel prices reached a historic peak of $6.40 per gallon on Thursday. This marks the highest recorded average in history. The national average for gasoline also stands above $4.40 per gallon. These figures come from the American Automobile Association.

President Donald Trump described these increases as a minor expense. He linked the cost directly to the war against Iran. The conflict has now lasted six months. He stated that preventing a nuclear weapon is worth the financial burden.

Defiance of seasonal price drops

Historical data shows fuel costs usually decline in late summer. Demand for driving drops as the weather cools. Refineries also switch to winter blend fuel. Current prices remain high despite these normal seasonal factors.

Political stance on energy costs

Trump claimed prices would drop rapidly after the war ends. He compared the future decline to a rocket ship in reverse. He expressed hope that talks with Iran could restart. No clear signs of a deal have emerged yet.

Monetary policy amid high inflation

The Federal Reserve raised interest rates this week. This is the first increase since 2023. Chair Kevin Warsh led the decision. Trump criticized the move, arguing rates should be at 1% or less. He avoided direct personal attacks on Warsh.

The tension between the White House and the Fed continues. High fuel costs remain a central issue for voters. The economic impact of the conflict is measurable in daily prices. Data from GN auto markets/energy: gasoline prices confirms the sustained high levels.

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

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