Diesel just set a record, and it happened fast. The national on-highway average jumped 20 cents in a single week to $5.454 a gallon, wiping out the easing we flagged only two weeks ago. For Texas contractors buying material delivered, this is the line item that moves fastest and hits hardest on a long haul. The cause is supply-side: distillate inventories are at their lowest level for this point in the year in about three decades, and diesel refining margins have hit records. Here is what the spike does to a delivered number and what to do about it this week.
Two weeks ago the fuel news was good. It is not anymore.
The national on-highway diesel average rose 20 cents in one week to $5.454 a gallon, a record, and it now sits $1.74 higher than a year ago (Source: U.S. Energy Information Administration, week ending August 17, 2026). Regionally, the Gulf Coast average, which most Texas hauls effectively price against, rose 19 cents to $5.237, and the Midwest posted the largest jump at 25 cents.
Diesel dipped in early August then jumped 20 cents to a record $5.45 a gallon. Source: U.S. Energy Information Administration, August 2026.The mechanics are worth understanding because they tell you how long this may last. U.S. distillate inventories fell to roughly 105.6 million barrels in mid-August, the lowest level for this time of year in about three decades, and refining margins on diesel reached record levels (Source: EIA weekly petroleum status data, August 2026). That combination, thin inventory and stretched refining capacity, is what produces a move this sharp.
The national on-highway diesel average rose 20 cents in a single week to $5.454 a gallon, and sits $1.74 above the same week last year.
Source: U.S. Energy Information Administration, week ending August 17, 2026
Fuel is the one input on a delivered load that can move this much inside a single billing cycle. Material prices move quarterly. Fuel moves weekly. On a short haul the effect is modest. On a long haul, a 20-cent week is the difference between a job that prices out and one that quietly does not.
If you have quotes outstanding written in the last few weeks, pull them and check whether the haul side still holds. Get delivered cost confirmed in writing before you commit crews, and on anything running into the fall, treat fuel as a live input rather than a fixed assumption.
We also owe readers a correction. Two weeks ago we reported that July input costs had eased and advised collecting the fuel break while it was open. That window closed within days. The lesson is not that the earlier read was wrong, it is that a one-month easing in a volatile input is not a trend, and delivered pricing should be confirmed close to the placement date.
With inventories this thin heading into fall, expect continued volatility rather than a quick return to summer levels. Price the haul on this week’s number, not last month’s.
Fuel goes up like a rocket and down like a feather. Price it weekly.
Call 214-282-7980 or request a quote at aggregatesnow.com.