Diesel Stocks: Lowest for This Week Since the Series Began
U.S. distillate stocks are the lowest they have ever been for this calendar week, in a federal series that goes back to the early eighties.
U.S. distillate stocks closed the week of August 21 at 103.4 million barrels, and that is the lowest level for this calendar week in a series that starts in 1982. Not the lowest in five years. The lowest in forty-five.
We did not take that from a headline. We pulled the federal weekly series and ran the comparison, because "record low" is a phrase that gets used loosely and this one turned out to be literal.
The number, and the four weeks before it
Distillate is the barrel your diesel comes out of. Here is the run, in thousands of barrels:
- July 24 — 110,632
- July 31 — 107,159
- August 7 — 107,149
- August 14 — 105,619
- August 21 — 103,391
Four consecutive draws, 7.2 million barrels gone since the July peak. And the timing is what makes it unusual: late summer is when inventories are supposed to build, because refiners are stacking distillate ahead of heating season. This year they went the other way.
Against the last five years, it is not close
Same calendar week, the five previous years:
- 2021 — 136,727
- 2022 — 111,706
- 2023 — 117,923
- 2024 — 123,086
- 2025 — 114,242
That averages 120,737. Today's figure sits 17,346 below it — 14.4 percent under the five-year average. And going back through the whole series, no year has ever come into this week lower.
What thin inventories actually do to you
This is not a price forecast, and anybody handing you one is guessing. What a thin barrel does is change how the market reacts.
With comfortable inventories, a refinery outage or a cold snap gets absorbed. With inventories 14 percent under normal, the same event has nothing to lean on, so the move at the pump is sharper and it arrives faster. The risk is not that diesel is expensive today. It is that the cushion that normally slows a spike is not there.
And the calendar is the second half of the problem. Whatever the number does from here, it starts the heating season from the lowest point this week has ever recorded.
How to read this number yourself, for free
The series is public and it updates every week. If you are going to follow it, follow it the right way, because the two common mistakes both point you wrong.
Do not read week over week. A single draw means very little; inventories move up and down constantly. What matters is the direction over a month and the gap against the same week in prior years, which is exactly the comparison most coverage skips.
Do not read the national number as your number. Distillate sits in regional districts, and a tight national figure can hide a region that is fine and one that is bad. If you run a corridor, the district your fuel comes from tells you more than the country does.
What an operator can do about it this week
- Know your cost per mile with fuel isolated. If a 30-cent move lands and you cannot say what it does to your number by Friday, you will find out from the bank instead.
- Look at your fuel surcharge language now, not after. A surcharge that lags two weeks is a two-week loan you are making to the shipper.
- Idling is the line item you actually control. Nobody can move the national barrel. You can move what the truck burns sitting still.
- Fill on the flat, not on the spike. When the move comes it comes fast, and the operators who get hurt are the ones running on fumes that week.
- Do not confuse a stock number with a pump price. They are related, not the same, and treating them as the same is how people over-buy at the wrong moment.
The part of this you can control is the burn. If you are running the engine all night for climate and power, that is fuel bought at whatever the market decides, every night. A Go Green APU moves that load off the main engine, and the math gets better every time the barrel gets thinner. If the truck also needs the front end looked at, The Truck Savers checks it at no cost.
Original source: U.S. Energy Information Administration.