Issue TSM-2026-10-12, Monday, October 12, 2026
The signal
Diesel is falling, but it is nowhere near last year's level. EIA's U.S. average on-highway diesel price was $6.199 a gallon for the week ending October 5, 2026, down $0.183 on the week. That is the second consecutive weekly decline, after $6.529 on September 21 and $6.382 on September 28, for $0.330 off in total. It is still $2.488 above a year ago, and FRED's copy of the series shows these two declines came after a rise from $4.578 on July 6 to $6.529 on September 21, a net $1.951 that included two down weeks. Regional and state averages ran from $5.699 in the Lower Atlantic to $8.082 in California.
NMFTA's Docket 2026-2 Disposition Bulletin, posted October 9, says a significant number of items moved to full scale density, meaning class is based on how much space a shipment occupies in a trailer relative to its weight. NMFTA gave no count. Ladders, shades and blinds, and some others were pulled back after industry feedback. The rewrite of Rule 640, which covers a shipment of several articles such as a pallet of mixed-class commodities, did not pass; NMFTA says it will propose an updated version.
Why it matters to shippers
Both items end up on the carrier invoice. A fuel surcharge billed against the wrong week or the wrong average can hide inside a market that moved $0.183 in seven days, and a falling price can invite a high surcharge being explained away as lag. The regional spread matters for the same reason: which average your contract's table references changes the answer. On density, if an item you ship is among those that moved, a class change may trace back to dimensions and weight, so your own measurements are evidence. These numbers cannot tell you whether an invoice is wrong. They tell you where to look first.
The playbook
- Shipping: Pull the fuel surcharge table your contract names, note which average it references (U.S. or a region) and which week applies, and compare it with the surcharge line on each invoice. Keep the quote with the shipment, including the dimensions, weight and class you quoted.
- Warehouse: Note any exception on the delivery receipt before you sign it, and record measured weight and dimensions at the dock. If a reweigh or reclass charge shows up later, that record is your side of the comparison.
- Finance and procurement: Keep a freight invoice discrepancy report for every invoice line that differs from its quote: charge type, amount quoted, amount billed, the difference, and the documentation the carrier cites. Keep the line open in your records until a cited table, certificate or inspection reference explains it.
One question answered
What does a carrier actually have to do once a written overcharge claim reaches it, and how long does it have?
For interstate shipments under 49 CFR Part 378, the carrier opens a separate file and assigns a successive claim file number (378.6). It must acknowledge a written claim in writing within 30 days of receipt, unless it has already paid or declined in writing (378.7). It must pay, decline to pay, or settle within 60 days after receipt, unless a written extension was agreed for extenuating circumstances (378.8). If it declines, or settles for a different amount, it must give the reasons in writing, citing tariff authority or other information from its investigation.
A thin claim does not simply die. Missing information is not grounds for disallowance (378.4(d)); the carrier must ask for what it needs and tell the claimant that a written claim must be filed before the 60-day limit applies (378.5(c)). An overcharge claim carries the claimant's name, the refund amount if known, and the freight bill (378.4).
These are the carrier's clocks, running from receipt of a written claim. They are not your filing deadline. Filing timing varies by carrier and by the contract or bill of lading, so check the terms governing the shipment. More in LanePilot's guide to freight invoice audit and overcharge recovery.
LanePilot field note: quote-to-invoice discrepancies
An audit needs two documents: the carrier invoice and the original quote for that same shipment. LanePilot matches them to the shipment on record, so the comparison is line against line. A check against a filed rate table only confirms the carrier applied its own tariff. It cannot see a shipment quoted at one price and billed at another, because it never had the quote.
The discrepancy types identified are undisclosed accessorial charges, duplicate billing against a shipment already audited, fuel surcharge variance, and reweigh or reclassification charges. A reweigh or reclass with a cited certificate or inspection reference is a legitimate correction, not an overcharge. One with no documentation behind it gets flagged for you to verify. LanePilot itemizes the difference between quoted and billed by charge type and drafts a dispute letter from that finding. You review it and file it with the carrier yourself; LanePilot does not send, negotiate or file anything with a carrier for you.
Sources and next step
EIA, Gasoline and Diesel Fuel Update, week ending October 5, 2026, released October 6, 2026; next release October 14. Not seasonally adjusted, all taxes included. FRED series GASDESW (weekly ending Monday, not seasonally adjusted, updated October 6, 2026) supplies the July 6 to October 5, 2026 run and republishes EIA's values from the same release. Method: weekly retail price survey (EIA-888). eia.gov/petroleum/gasdiesel and fred.stlouisfed.org/series/GASDESW
NMFTA, 2026-2 Disposition Bulletin, posted October 9, 2026. Method: NMFTA publishes the National Motor Freight Classification and dispositions its classification dockets. nmfta.org/news
49 CFR Part 378, eCFR title 49 issue date October 5, 2026. Method: regulation text read directly from the eCFR. ecfr.gov, title 49, part 378
Next step: create an account at lanepilottech.com/signup and bring both the carrier invoice and the original quote for the same shipment.