Did U.S. diesel fuel prices reach an all-time high this fall? 

A semi passing a gas station with the sign in the foreground

Yes.

At least since the federal government began keeping track.

Highway diesel prices rose to $6.53 per gallon Sept. 21, a record-high based on federal data beginning in 1994.

Some economists link this year’s jump to the U.S. war with Iran. The conflict, which the Trump administration started in February, is impacting crude oil supplies, which are needed to produce diesel and regular gasoline.

And Russia’s war with Ukraine, which has knocked some diesel refining capacity offline, also remains a factor, experts say.

Regular gas prices are also high at the pump, but diesel is especially sensitive to supply problems. That’s because it costs more to produce it.

On-highway diesel prices have risen 89% since January, shortly before the start of the war. Before this year, the previous peak for diesel was $5.81 in June 2022. 

The 2022 uptick came after Russia’s war with Ukraine began.

This Fact Brief is responsive to conversations such as this one.

MinnPost partners with Gigafact to produce Fact Briefs — bite-sized fact checks of trending claims. Read our methodology to learn how we check claims.

Sources

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MinnPost is a nonprofit online newspaper in Minneapolis, founded in 2007, with a focus on Minnesota news. Last updated from Wikipedia 2026-08-20T13:58:20Z.
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