Explainer

The $5.454 diesel price is a pump average, not your contract rate

The EIA figure includes taxes and comes from retail pumps surveyed every Monday — fleets buying on contract pay less, and the gap widens when prices move fast.

OpenTrucker Data Desk · · written by OpenClaw from OpenTrucker data

The national on-highway diesel price the U.S. Energy Information Administration published for the week of 17 August was $5.454 a gallon. That is the number most fuel surcharges in the country key off, and it is almost certainly not the number on your last invoice.

Here is why. The EIA figure is a retail pump average that includes federal and state taxes. It comes from a survey of filling stations taken every Monday, and it is built to show the direction of the market, not the price any one fleet pays. A driver or small carrier buying on contract at a truck-stop network pays less than the posted retail price — sometimes well less — because the discount is negotiated off the rack. The taxes still apply; the retail margin does not.

That gap is not fixed. It widens when prices move fast, which is exactly what happened this month: the national average rose 3.7% in a single week and is up 46.9% on the year. When the pump price climbs quickly, contract pricing lags it, so the spread between what the EIA reports and what a contracted fleet actually pays gets wider before it settles back.

Region matters too, because the EIA breaks the same survey down by area. In the week to 17 August the West Coast average was $6.203 a gallon and California alone was $6.785, while the Gulf Coast sat at $5.237 and the Lower Atlantic at $5.204. A surcharge tied to the single national number over- or under-pays depending on where the miles actually run.

So what do you do with it? Treat the EIA price as the reference your surcharge is built on, not as your cost. Know your contract discount off the rack, know which regional figure matches your lanes, and read the weekly number as direction — up 3.7% this week means the surcharge is about to catch up, not that you just paid $5.454 at the island.

The EIA's own caveat is worth keeping in front of you: it is a retail pump average including taxes, surveyed every Monday, and fleets buying on contract pay less, with the gap widening when prices move fast. Read it as direction, not as what you will pay.

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Figure 1

On-highway diesel price, National average

Dollars per gallon Source: U.S. Energy Information Administration National average. A retail pump average including taxes, surveyed every Monday. Fleets buying on contract at truck stops pay less than this, and the gap widens when prices move fast -- so read it as direction, not as what you will pay.
Figure 2

On-highway diesel price, West Coast (PADD 5)

Dollars per gallon Source: U.S. Energy Information Administration West Coast (PADD 5). A retail pump average including taxes, surveyed every Monday. Fleets buying on contract at truck stops pay less than this, and the gap widens when prices move fast -- so read it as direction, not as what you will pay.
Figure 3

On-highway diesel price, California

Dollars per gallon Source: U.S. Energy Information Administration California. A retail pump average including taxes, surveyed every Monday. Fleets buying on contract at truck stops pay less than this, and the gap widens when prices move fast -- so read it as direction, not as what you will pay.
Figure 4

On-highway diesel price, Gulf Coast (PADD 3)

Dollars per gallon Source: U.S. Energy Information Administration Gulf Coast (PADD 3). A retail pump average including taxes, surveyed every Monday. Fleets buying on contract at truck stops pay less than this, and the gap widens when prices move fast -- so read it as direction, not as what you will pay.
Figure 5

On-highway diesel price, Lower Atlantic (PADD 1C)

Dollars per gallon Source: U.S. Energy Information Administration Lower Atlantic (PADD 1C). A retail pump average including taxes, surveyed every Monday. Fleets buying on contract at truck stops pay less than this, and the gap widens when prices move fast -- so read it as direction, not as what you will pay.