National average diesel fuel prices were $3.47 per gallon as of October 4, 2021, according to the U.S. Energy Information Administration.
This is an increase from the last week of September when diesel fuel prices were $3.40 as of Sept. 27.
On-highway diesel fuel prices increase to start the month of October and increase over $1 from a year ago.

Diesel fuel prices were $2.38 last year.
Photo: EIA
National average diesel fuel prices were $3.47 per gallon as of October 4, 2021, according to the U.S. Energy Information Administration.
This is an increase from the last week of September when diesel fuel prices were $3.40 as of Sept. 27.
A year ago, diesel fuel prices were $2.38.
Current average diesel prices by region are:
East Coast: $3.43
Midwest: $3.43
Gulf Coast: $3.20
Rocky Mountain: $3.64
West Coast: $4.07

The national average price of a gallon of diesel dropped by more than 5 cents this week, and all but one region reported price decreases.
Read More →
ChargePoint has enabled more than 90 charging ports for the South Coast Air Quality Management District in Southern California. The project replaced outdated chargers with 55 new, Level 2 ChargePoint units capable of serving 94 vehicles simultaneously.
Read More →
Pajarito Powder has appointed Christian Mohrdieck, who has a wealth of experience and knowledge in both the fuel cell and electrolyzer businesses, as its new CEO.
Read More →
The average price of diesel remains above $5 per gallon in every U.S. region and nationally. With continued oil supply chain challenges in the Middle East, prices are significantly higher than a year ago and also two years ago.
Read More →48% of field service leaders are investing in AI to manage customer communication and self-service. Get the latest on how fleets are using AI and thinking about the future.
Read More →
For commercial fleets and trucking operations, the change is designed to address a common pain point: travel expenses that fall outside traditional fuel controls.
Read More →
The national average diesel price jumped by nearly 10 cents this week. However, EIA now provides a comparison with prices two years ago, showing diesel is 23.9 cents cheaper now.
Read More →
As commercial battery-electric vehicle adoption continues to grow, what is the state of electricity as a fuel source, and what are the growth trends in charging capability in 2026?
Read More →
WEX adds EV charging payments to its fleet card, letting mixed-energy fleets pay for fuel and public charging with one card, one account, one invoice.
Read More →
Average diesel prices increased again this week, both nationally and across every region. The national average price increased by more than 9 cents.
Read More →