National Diesel Average Reaches $6, 28 States Hit Record Highs

For the first time ever, the U.S. national average diesel price climbed to $6.00 a gallon on Thursday, based on live figures from GasBuddy. Diesel set new record highs in 28 states.

The latest milestone came under a week after diesel hit $5.85. At $6.00 per gallon, the fuel is roughly $2.30 more expensive than a year earlier.

HISTORY: diesel has crossed $6/gal nationally for the first time ever, according to live GasBuddy data. every truck, every delivery, every package, every grocery run just got more expensive. the cost of moving everything in america just hit a record.

— Patrick De Haan (@GasBuddyGuy) September 10, 2026

28 States See Diesel Records Fall

Patrick De Haan, GasBuddy's head of petroleum analysis, identified the 28 states where records were set. The list included Texas, California, Florida, Washington and North Carolina.

In addition, five California stations have exhausted the space on their price boards. De Haan noted that those stations are selling diesel at $9.999 a gallon, the top number their pumps can display.

NEW: U.S. diesel prices have hit an ALL-TIME HIGH of $5.97/gallon.

Remember: higher diesel prices mean higher delivery and heating costs. Your energy bill, your groceries, packages at your door— all of it will cost more.

Donald Trump’s war with Iran did this.

— Elizabeth Warren (@SenWarren) September 10, 2026

Crude Above $100 Intensifies Pressure

Crude oil is the primary driver of the diesel price surge. Brent crude exceeded $100 per barrel on September 8 and has risen further since. It hit an intraday peak around $111 today, the highest since late May.

As of Friday's press time, Brent was trading close to $108.2 per barrel, gaining 0.61%. West Texas Intermediate advanced 0.53% to trade at $103.

Both benchmarks are heading for a weekly close above $100 for the first time since mid-May. They have risen more than 20% over the last month.

Disruptions in shipping lanes account for a large part of the increase. On Thursday, Iran-aligned Houthi forces captured Yemen's port of Mocha, and tanker assaults have kept Strait of Hormuz traffic restricted.

BREAKING: Saudi Arabia says its crude oil production has fallen to its lowest level since 1990 amid the Iran War.

Today, Saudi Arabia notified OPEC that its production declined by 1.9 million barrels per day, to a total of 6.2 million barrels per day.

Provisional…

— The Kobeissi Letter (@KobeissiLetter) September 10, 2026

Demand projections are heading in the opposite direction. On Thursday, OPEC reduced its 2026 global oil demand growth forecast to 380,000 barrels per day, marking the fifth consecutive reduction.