WEX

Jul 1, 2025

According to the most recent report by the U.S. Energy Information Administration (EIA), the national average cost of diesel fuel at the start of this week was lower than the prior week, and all five regions also reported lower average prices. The national average price per gallong of diesel fuel in the U.S. decreased by nearly 5 cents as of June 30, 2025. The national average price of $3.73 is 8.6 cents lower than at the same time last year. This week, regional average prices decreased in all five regions. The decreases ranged from 1.5 cents in the East Coast region to nearly 7 cents in the Gulf Coast region. The averages for all five regions are still lower than at the same time last year. The most expensive place to buy diesel is Hawaii, at $5.26 per gallon, and the least costly is Texas, at $3.21 per gallon. Regional Diesel Prices: 1st Week of July At the end of June, average diesel prices reported by region, as of June 30, were: East Coast: $3.77 Midwest: $3.71 Gulf Coast: $3.37 Rocky Mountain: $3.66 West Coast: $4.42 Regional Diesel Prices: 4th Week of June This week, the national average price of diesel increased by more than 20 cents. The price per gallon also increased significantly in every region, two of which saw increases of more than 20 cents. In the fourth week of June, average diesel prices reported by region, as of June 23, were: East Coast: $3.79 Midwest: $3.78 Gulf Coast: $3.43 Rocky Mountain: $3.69 West Coast: $4.46 Diesel Price Factors & Outlook According to AAA, the late-June U.S. airstrikes in Iran caused petroleum futures to spike, with oil creeping up to $78/bbl. That quickly dissipated, and oil prices soon returned to pre-conflict levels. Because 61.6 million holiday travelers are expected to hit the road for the Fourth of July, gas prices may increase slightly during the first week of the month. Read more about 0 Comments This week, the average price of diesel fuel increased nationally and in every region. The national average is 10 cents higher than a week ago, and 16 cents below last year’s average. API releases its updated Motor Oil Guide featuring ILSAC GF-7 standards, offering better fuel economy, engine protection, and performance for modern vehicles. Find out how an AI-powered platform supports nearly $275K in fuel savings and over 1.1M pounds of CO₂ emissions avoided. What embedded costs are there in a gallon of diesel fuel? What are the main factors impacting the price per gallon? Here are the answers. CNG is more than an alt fuel. Today’s engines offer real cost savings, cleaner ops, and diesel-matching power for commercial fleets looking to level up. This week, the average price of diesel fuel decreased nationally and in all five regions. The Gulf Coast and Rocky Mountain regions reported the largest decreases. The national average is nearly 5 cents lower than a week ago and 27 cents below last year’s average. Explore how mixed-energy fleets are reshaping commercial transportation with insights from WEX's latest survey and expert strategies for seamless integration. Learn what costs are embedded in the price of a gallon of on-highway diesel fuel, and hear from Motive's Hamish Woodrow explain what drives the cost of diesel up, or down. This week, the average price of diesel fuel decreased nationally and in all five regions. Overall, the national average is 46 cents lower than a year ago. WEX will continue to deliver fuel cards to Enterprise Fleet Management customers upon signup to help them monitor and control fuel-related activities and expenses. On Earth Day, the Propane Education & Research Council will be touting the advantages of propane autogas and renewable propane. Ultra-low nitrogen oxide (NOx) propane autogas engines reduce harmful NOx emissions by up to 96%. RTA and RoadFlex partner to integrate fuel and expense data into Fleet360, helping fleets gain real-time insights and streamline operations. Joel Stutheit is the new senior manager of business development on-road market portfolio at the Propane Education & Research Council. Previously, he worked for a school district and established his district’s propane autogas school bus program Fuel savings require more than a discount. Uncover hidden costs, fix compliance gaps, and boost ROI with cross-team effort and the right partner support.