Diesel prices exceed $6 in 49 states; California hits $8.42 per gallon

Diesel is now over $6 a gallon in 49 states, and California leads the nation with an average price of $8.42 per gallon, according to the American Automobile Association’s latest fuel‑price report. The steep rise marks the highest level since the pandemic‑era supply crunch and follows a string of refinery shutdowns and geopolitical shocks that have tightened the market.

The price surge matters because diesel powers most freight trucks, delivery vans and many public‑service vehicles. When diesel costs rise, shipping companies raise freight rates, and the increase ripples through the economy, inflating the price of groceries, building materials and consumer goods. Analysts point to several factors: a wave of unplanned refinery outages in the Gulf Coast, the lingering effects of COVID‑19 on supply chains, and higher demand as the U.S. economy rebounds. Internationally, the war in Ukraine has limited Russian diesel exports, while OPEC+ production cuts have kept global oil supplies tight. In California, the high price reflects not only the national squeeze but also the state’s higher fuel taxes, stricter emissions standards and a limited number of refineries that must meet stringent environmental rules.

The lowest diesel prices are found in the Midwest, with North Dakota, Montana and South Dakota averaging just above $5.80 per gallon. Trucking associations warn that continued price pressure could force carriers to cut routes or delay deliveries, especially for small businesses that cannot absorb higher fuel costs. Consumer‑advocacy groups are urging the federal government to release more oil from the strategic petroleum reserve and to consider temporary tax relief for diesel. Industry experts say the market may stabilize by early next year if refinery capacity returns and global supply improves, but they caution that any new geopolitical tension or a resurgence of pandemic‑related disruptions could push prices higher again.