Diesel Finally Dropped. Here’s How to Make Sure Your Fleet Actually Feels It.

For the second week in a row, the weekly diesel number went down instead of up. EIA’s national on-highway average was $6.199 a gallon on October 5, down 18.3 cents from the week before and about 33 cents below the record $6.529 set in late September.

That is welcome news. It is also not a return to normal. According to EIA’s October 6 update, diesel is still about $2.49 a gallon above the same week last year. (We walked through the cost-per-mile math at record diesel a few weeks ago.)

For owner-operators and small fleets, a week like this is when money quietly slips away. Surcharges reset, regional prices move at different speeds, and the quarter that just closed was bought at some of the highest prices of the year. Here is where to look this week.

The drop didn’t land evenly

The national average hides a lot. In EIA’s September 28 survey, the first week of the decline, summarized in Ag Bull’s September 29 analysis, the Gulf Coast fell 22.2 cents to $5.955. The East Coast fell 13.1 cents to $6.137. The Midwest fell 15.4 cents but still sits at $6.526, above the national average, with harvest equipment competing for the same fuel. The Rocky Mountain region went the other way, up 6.7 cents to $6.407. California eased slightly and was still at $8.181. This week the East Coast fell another 18.6 cents, to $5.951.

If your lanes cross regions, that spread is real money. The gap between Gulf Coast and Midwest pumps in that survey was about 57 cents a gallon. On a 150-gallon fill, that is roughly $85 at a single stop.

Plan fuel stops around the route, not around habit. A driver who knows where the next good stop is will make a better call than one who waits for the gauge to make it for them. Dispatchers who can see where every truck is can help with that call before it turns into an expensive fill in a high-price state.

Make sure your fuel surcharge moves both ways

A lot of fuel surcharge tables key off that same weekly EIA number. The Department of Energy’s ATLAS schedule, for example, used the September 28 price of $6.382 to set a truckload surcharge of 83 cents a mile and an LTL surcharge of 42 percent for shipments from September 30 through October 6, per the same Ag Bull report. This week’s lower index resets those numbers again.

Two things are worth checking. First, if you bill a surcharge, make sure your invoices use the current week’s index, not whatever number was on a rate confirmation from three weeks ago. Shippers will notice when prices fall. You want to be just as quick when they climb again.

Second, if you are leased on or hauling for a carrier that passes surcharge through, ask how often the table updates. Weekly keeps up with the market. Monthly lags it in both directions, and in a year with swings like this one, a month is a long time.

Don’t spend the savings yet

Two weekly declines are a break, not a trend. EIA’s Weekly Petroleum Status Report for the week ended September 18 showed U.S. distillate inventories still 12 percent below the five-year seasonal average. Tight supply means prices can turn back up quickly, and winter demand is not far off.

Treat this week’s lower number as a chance to rebuild a cushion, not to loosen up. Keep idle time in check, especially at shippers and receivers where an engine can run for hours. Keep an eye on out-of-route miles. And don’t take on fixed costs that only work at today’s price.

Q3 is closed. Your IFTA return is next.

The third quarter ended September 30. Every gallon you bought in July, August, and September now has to be reported. Q3 IFTA returns are normally due October 31, and because that falls on a Saturday this year, the deadline moves to the next business day, Monday, November 2. Confirm the date with your base jurisdiction.

Missing it gets expensive. The Texas Comptroller’s fuels tax FAQ spells out the IFTA late penalty: $50 or 10 percent of the tax due, whichever is greater, and it applies even to returns with no tax due. Records have to be kept for four years from the due date or the filing date, whichever is later.

The hard part of IFTA usually isn’t the math. It is having clean miles by state and fuel receipts that match. If your miles live in a paper log or a driver’s memory, start pulling them together this week, not the night before it is due. GPS and ELD records give you trip data to back up your state-by-state miles, and receipts are much easier to match to trips while everyone still remembers them.

The takeaway

Diesel came off its record, but the relief is partial, uneven, and could reverse. This week, check three things: that your surcharge uses the current index, that your fuel stops follow the regional spread, and that your Q3 miles and receipts are ready to file.

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