Cost per mile
Diesel fuel cost per mile
70.4 cents a mile for the week of Jul 6, 2026, at a stated 6.5 mpg reference. About $352.15 of fuel for a 500-mile haul. Fuel only; not an all-in operating cost.
Data through Jul 6, 2026 · page updated Jul 9, 2026
- Cost per mile
At the stated 6.5 mpg reference, this week's $4.578/gal puts fuel at 70.4 cents a mile, about $352.15 for a 500-mile haul. The week's move trims about $6.92 from the fuel cost of a 500-mile haul.
| Period | Cost per mile (6.5 mpg) | Fuel for a 500-mile haul | Week of |
|---|---|---|---|
| This week | 70.4 cents/mi | $352.15 | Jul 6, 2026 |
| A week ago | 71.8 cents/mi | $359.08 | Jun 29, 2026 |
| A month ago | 80.2 cents/mi | $400.77 | Jun 8, 2026 |
| A year ago | 57.5 cents/mi | $287.62 | Jul 7, 2025 |
About Diesel fuel cost per mile
Every figure on this page uses a stated reference efficiency of 6.5 miles per gallon, a plain mid-fleet figure for a loaded Class 8 truck. It is a fixed reference for comparing weeks, not an estimate of any particular truck; a rig running 7.5 mpg spends about 13% less per mile than the reference, one at 5.5 mpg about 18% more. The 500-mile haul line is the same math over one round figure of distance: about 77 gallons burned.
The underlying price is EIA's Monday on-highway diesel release, the same index on the DOE number page. This page only restates it in the unit an operator actually plans in.