A Year That Added Two Dollars a Gallon
Twelve months took the national average from $3.77 to $5.97 a gallon. That is about forty thousand more per truck.
A year ago a gallon of diesel cost $3.766. Last week it closed at $5.967. That is $2.20 more per gallon in twelve months, up 58%, and the highest price in the entire weekly series the EIA has kept since 1994.
A single number impresses and then gets forgotten. The year's arithmetic does not.
The floor moved, not the ceiling
What changed this year was not a spike. It was the bottom. In January the national average touched $3.459, its lowest point in the last twelve months, and after that it never settled back under four dollars.
The move reads better in stretches than in weeks: up 22.8% over six months, and 14.5% over the last three. This is not a one-week jump. It is a slope half a year long.
What passing $5 used to cost
In 32 years of weekly records, national diesel has been at five dollars or more in 54 weeks. Twenty-two of those weeks are from 2026.
Put another way: four out of every ten weeks this country has ever paid five dollars a gallon happened this year. They used to be short episodes, almost always in 2008 and 2022. Now it is the normal condition of the year.
The number that matters: per truck
A percentage does not drive. A truck does. A tractor returning 6.5 miles per gallon over 120,000 miles a year burns about 18,460 gallons.
- At last year's price: $69,526 in fuel.
- At today's price: $110,160.
- Difference: $40,634 a year, per truck.
At 6.0 mpg over 100,000 miles the hit is $36,683. Across five trucks, that is the price of a used tractor, in fuel that did not exist on the books last year.
Against 2022, which was the benchmark
The previous record was $5.819, set on June 20, 2022. For four years that was the number everyone compared against. It now sits 2.5% below the current price. Four years is a long time for a ceiling to hold, and this summer went straight through it without much noise.
The difference from that year is duration. The 2022 peak was brief and came down quickly. This one has been parked above five dollars for months, and what gets paid on every load is the year's average, not the peak.
The same thing in cents per mile
The annual figure is big enough to turn abstract. Cents per mile lands better, because that is the unit a load gets quoted in.
At 6.5 miles per gallon, fuel cost 57.9 cents per mile a year ago. Today it costs 91.8 cents. That is 34 cents more for every mile turned.
On a 500-mile run that is $169 extra coming out of the same freight bill. On a truck returning 6.0 mpg, the gap widens to nearly 37 cents per mile.
It is the number worth keeping in front of you when quoting, because a rate built on last year's diesel runs short from the first mile.
The only part a shop controls
The price is not negotiable. Consumption is, and the gap between 6.0 and 6.5 miles per gallon is worth more than ten thousand dollars a year in this same arithmetic.
Alignment. An axle out of square makes the tractor move slightly sideways, and that resistance is paid in gallons every day, not on the day it shows up on a tire.
Tire pressure. An underinflated tire raises rolling resistance. It is the cheapest adjustment there is and the one most often postponed.
Idle time. Every hour the engine runs without moving is fuel that produces no mile, and at this price the seasonal total stops being small.
None of the three is a promise of miracle savings. All three are the part of the bill that actually depends on the operator.
What to watch next week
The EIA publishes the national average every Monday. The figure worth following is not whether it rises or falls in a given week. It is whether that January floor of $3.46 ever shows up again, or whether the year ended with a new one.
At The Truck Savers™ we do alignment, suspension and brake work in Houston, Dallas and Monterrey: what cannot be controlled on price gets controlled on consumption.