US Fleet Diesel Costs: Price Per Gallon & Cost Per Truck
US diesel averages $6.35 per gallon nationally as of October 2026. Prices range from $5.95 in Gulf Coast states to $7.33 on the West Coast. Updated weekly from EIA data.
Average retail prices · Source: U.S. Energy Information Administration (EIA) Weekly Retail Gasoline Survey
Week ending October 26, 2026
All prices in $/gallon · Refreshes daily · Published weekly by the U.S. EIA
Hover or tab through the points to read each value.
What Today's Diesel Price Costs Your Fleet
At $6.35/gallon, a Class 8 semi running 100,000 miles a year at 6 MPG burns about $105,867 in diesel, per truck, every year. A 20-truck fleet carries roughly $2,117,333 in annual fuel budget at today's pump price.
That fuel budget is what a fuel saving device changes. FuelMarble is a fuel efficiency device that cuts consumption 7–15%: at a conservative 10% it takes about $10,587 per truck off that yearly cost, with no change to routes, drivers or trucks.
See Class 8 fleet fuel savings at today's diesel price, or size up with FuelMarble L for semis and heavy diesel.
Gas prices are high, here's how drivers are cutting consumption by 7–15%
FuelMarble is a fuel saving device that drops into your coolant reservoir. Independently verified across 9 vehicles, see Class 8 fleet fuel savings at today's diesel price. Ships to the US in USD.
View live UK petrol & diesel prices by retailer, powered by GOV.UK (DESNZ) weekly data.
Prices by PADD Region
The EIA divides the US into five Petroleum Administration for Defense Districts. West Coast runs $1.00–$1.50 above Gulf Coast due to California's isolated fuel supply.
Gas Prices by State
EIA tracks weekly prices for key states, ranked cheapest first. Green badges mark the three cheapest. Tile colour: green = below national average ($4.41), amber = above, red = significantly above.
Major City Gas Prices
Metro-level prices from the EIA city series, ranked cheapest first. Houston and Chicago reflect Gulf Coast and Midwest supply economics; Los Angeles and San Francisco consistently rank among the most expensive in the nation.
Why do US gas prices vary so much by location?
Every gallon of US gasoline includes a federal excise tax of $0.184, but state and local taxes range from $0.08 (Alaska) to over $0.68 (California). That single factor creates a structural $0.60+ gap between cheapest and most expensive states before pump margins are added.
The West Coast (PADD 5) is in a semi-isolated supply position. California mandates its own CARB-compliant fuel blend producible only by a handful of refineries. When one goes offline, there is no Gulf Coast pipeline connection to fill the gap, prices spike with no alternative source. Oregon, Washington, and Nevada are caught in the same supply region.
The Gulf Coast (PADD 3) is consistently cheapest, it hosts over 50% of US refining capacity, meaning fuel travels the shortest distance from refinery to pump. Texas, Louisiana, and the wider Gulf states benefit from this proximity combined with some of the lowest state fuel taxes in the nation.
Gas prices are unpredictable.
Your fuel efficiency doesn't have to be.
FuelMarble is a fuel efficiency device, a precision-engineered mineral you drop into your coolant reservoir. It eliminates the thermal boundary layer at the engine wall, allowing more complete combustion, delivering a verified 7–15% fuel efficiency improvement on every journey, with some high-mileage commercial vehicles seeing up to 22%.
No additives. No ECU tuning. No engine modifications. Ships to the US in USD. Installation: 60 seconds. One device lasts the lifetime of the vehicle. See how the 7–15% saving actually works.
Based on 10% conservative efficiency improvement. Field tests document 7–15% for most vehicles; some commercial applications exceed this range.
Calculate Your Savings at Today's Prices
Enter your mileage, vehicle MPG, and current fuel price to see exactly how much FuelMarble would save you, and when it pays for itself.
🇺🇸 United States, units in use: miles · mpg (US gal) · $
Distance in miles · Efficiency in US MPG · Fuel priced per US gallon. 1 US gallon = 3.785 litres, about 20% smaller than the UK/Canadian Imperial gallon.
1. Trip & Efficiency Patterns
Unit locked to your region, switch tabs above to change
Typical US: cars 25–35 mpg · SUVs 18–26 mpg · pickup trucks 14–22 mpg · semi-trucks 5–8 mpg
US MPG uses US gallons (3.785 L), different from UK/Imperial MPG
Enter price per US gallon in $. Current range $4.41–$6.35 (regular to diesel), week ending 26 Oct 2026. See live US fuel prices →
Typical commercial fleet: 22–26 working days/month
2. Fleet Composition
Typical range: 7–15%. Actual results vary by vehicle type, load, and driving style.
This is the reduction in fuel used, not the gain in km/L. They are different numbers: a vehicle going from 7.4 to 8.2 km/L gains 10.8% in distance per litre but buys 9.8% less fuel. If you have your own before/after figures, use 1 − (before ÷ after).
Estimates based on your inputs. Actual results depend on vehicle type, load, route, and driving conditions.
About this data
- Source
- Published by the U.S. Energy Information Administration (EIA), in its weekly retail gasoline and diesel price survey. FuelMarble does not survey fuel prices, we read the official feed and present it unchanged.
- Update frequency
- Weekly. The EIA surveys pump prices each Monday and publishes that afternoon, covering the week just ended. This page refreshes daily, so it always shows the most recent EIA release.
- Possible delay
- Because the survey is weekly, the figure here can be up to seven days behind the price on the pump today, longer around federal holidays, when publication slips. The EIA may also revise figures after first release.
- Posted prices, not your contract rate
- These are retail pump prices including taxes. Fleets buying on fuel card, bulk or contract terms typically pay less. Use these figures for trend and regional comparison, not as the rate your fleet actually pays.
- Reference only
- Provided for general reference. Figures may be revised by the publisher after release, and no warranty is given as to accuracy or completeness. Always confirm against your own fuel invoices before using these numbers in a budget or contract. Fuel prices establish cost only. They are not a measure of FuelMarble's performance, which is evidenced separately on our verified results page.
Reading shown on this page: week ending October 26, 2026
Licensing: UK figures contain public sector information licensed under the Open Government Licence v3.0. Canadian figures are used under the Open Government Licence – Canada. We reuse the data only; government logos and crests are not covered by those licences and are not used here.