US diesel prices fell below $6 a gallon on Saturday for the first time in two months, offering limited relief to freight operators, farmers, businesses and consumers after fuel costs reached a record national average of $6.519 in September, Reuters reported.
The national average retail diesel price stood at $5.998 a gallon, according to fuel price tracker GasBuddy. Diesel had crossed $6 on September 10 and reached its record level on September 22. The fuel is a major input for trucking and freight movement, making its price an important factor in transportation costs and wider inflation.
The decline follows easing geopolitical tensions, weaker seasonal demand and a recent fall in crude oil prices. Brent crude futures have dropped 18.5% over the past two weeks, according to the report. Diesel prices had risen sharply after disruptions to oil supplies linked to the US-Israeli war against Iran and systematic Ukrainian attacks on Russian refineries, Reuters said.
The earlier price surge affected several parts of the economy. Higher diesel costs increased pressure on freight businesses and consumers while adding to the operating costs of farmers and other fuel-intensive businesses. The report also said elevated fuel prices contributed to broader inflation and became a political issue during this month’s US midterm elections.
Prices have varied significantly across the country. California, where refining capacity is constrained and fuel specifications are more stringent than in other states, briefly recorded diesel prices above $10 a gallon. The regional disparity highlights how local refining capacity and fuel regulations can affect the cost of moving goods and operating vehicles, even when national averages begin to fall.
The Trump administration introduced several measures intended to reduce fuel costs, including temporarily lifting federal taxes on red-dyed diesel, easing sanctions on Russian fuel and launching an $8 billion support programme for farmers facing higher fuel expenses during the autumn harvest. Reuters reported that these measures provided limited relief while supply concerns connected to the Iran war continued to influence the market.
Seasonal conditions are now contributing to lower prices. Patrick De Haan, GasBuddy’s head of petroleum analysis, said demand generally softens in autumn as people drive less, hurricane season ends and the risk of disruptions to Gulf Coast refineries declines. Refinery maintenance is also largely complete by November, allowing production rates to recover, he said.
Gasoline prices have also fallen below $4 a gallon this month for the first time since August 10, according to GasBuddy data. The next movement in diesel prices will depend on crude oil prices, refinery output, supply disruptions and seasonal demand, with the national average remaining close to the $6 threshold.
