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Diesel hit $6.45 on September 18. Produce freight is up 40-120%. Where it lands in the cart

By Rachel Whitfield··7 min read·Tariff & Price Watch
Diesel at a record $6.45 a gallon and produce freight costs, September 2026
⚡ What happened, in 30 seconds

Key facts

This is a fast-moving story. Prices, tariffs and policy in this brief were correct as of September 20, 2026 and can change from one day to the next; we update when the primary sources do.

Diesel cost $6.45 a gallon on Friday, September 18, a record, against $3.71 a year earlier (AAA, September 18). That is the number behind every produce truck and every combine in the field this month. We priced a 3 lb bag of Gala apples at $4.49 this week; the trucks that bring them out of Washington now run on fuel that costs 74% more than last September.

What happened

The weekly numbers keep stepping up. EIA's on-highway average was $5.599 on August 31, $5.967 on September 7 and $6.285 on September 14 (EIA, September 15). AAA's daily series then ran $6.31 on September 16, $6.40 on September 17 and $6.45 on September 18 (AAA, reported by USA Today and Dallas Express). GasBuddy's Patrick De Haan counted 44 states at all-time diesel highs on September 17 (X post, quoted by AOL, September 18).

The farm side is where it bites first. Reuters visited a Missouri corn and cattle farm on September 18 where one combine burns 300 gallons of diesel; Purdue economist Michael Langemeier put fuel costs at $11 an acre above last year for corn and $7 for soybeans. A vegetable grower near Gonzales, California told Reuters his fuel bill went from about $5 to about $7 a gallon, a 40% rise.

Then the trucks. Croke told Reuters that refrigerated rates out of California are up 40% to 120% year on year and that independent truckers, who pay for fuel up front, may not survive further increases. Michigan State's David Ortega gave the plain version: most food moves on trucks, and those trucks use diesel (Reuters, September 18). Rail is not a full escape either. USDA data show the average fuel surcharge on grain rail shipments at 48 cents per car-mile in the second week of September, up 153% from a year earlier (Reuters, September 14).

Two signals ran the other way this weekend. The head of U.S. Central Command, Admiral Brad Cooper, said on September 19 that oil and LNG volumes through the Strait of Hormuz over the past two weeks were higher than at any point in the past six months (Bloomberg, September 19). And Iran's security chief Mohsen Rezaei said on September 19 that Tehran had sent mediators in Qatar and Pakistan its conditions for resuming talks, including an end to the naval blockade (Reuters, September 19). Brent slipped 0.93% on September 18 to $104.87 (Reuters).

What has not happened

No retail grocery index has moved yet on the September diesel spike; the next BLS CPI release, covering September, is due in mid-October. Ortega told Reuters that retailers may absorb short-term increases and that freight contracts signed at lower fuel prices do not yet carry the new surcharges. Bank of America analysts said on September 17 that seven straight weeks of rising diesel make it hard for surcharges to catch up (AOL, September 18). So the pass-through is coming, but it is not in shelf prices in a measurable way today.

No ceasefire exists. Iran's conditions are conditions, not an agreement, and Reuters reported Tehran is waiting on a reply from the White House. The Hormuz volume figures come from a military statement, and Iran maintains the strait is closed. Nothing in the last 48 hours changed the fuel supply picture for October.

There is no national diesel price cap or fuel tax holiday. The federal action so far is a 90-day waiver, effective September 16, letting fuel-tanker drivers work 16 hours in a 24-hour window instead of 14 (Reuters, September 17).

Which foods are exposed

Disclaimer: the freight rates, farm cost figures and per-food exposure below are calculations by third parties (DAT Freight & Analytics, university economists, growers quoted by Reuters), not official US government statistics. Only the EIA and AAA fuel prices are official series. Our cart estimate further down is our own planning number, not a forecast.

FoodWhy it is exposedDomestic fallback
Fresh berries, lettuce, broccoli from CaliforniaRefrigerated truck rates out of California up 40-120% (Reuters, Sept 18)Frozen vegetables packed regionally; apples and cabbage that ship denser
Apples and pearsYakima Valley reefer rates at a four-year high mid-harvest (Reuters, Sept 18)Local-orchard fruit at farm stands now; store apples cold, they keep 2-3 months
Fluid milk, yogurtDaily refrigerated delivery, short shelf life, no inventory buffer (Ortega, Reuters, Sept 18)Shelf-stable UHT milk, powdered milk for baking
Fresh meat and poultryRefrigerated distribution plus feed grain shipped by rail with a 153% higher fuel surcharge (Reuters, Sept 14)Freezer buys on markdown, whole birds instead of parts
Rice, dried beans, flourBulk, non-refrigerated, moves by rail; lowest fuel share per calorieAlready the fallback; buy the 20 lb bag

What to do this month

Buy the refrigerated, long-haul items before the freight contracts reset. October is when carriers renegotiate fuel surcharges, and produce from California is the single most exposed line on the receipt. A 5 lb bag of carrots or a head of cabbage travels denser and cheaper than clamshell berries.

Shift one meal a week from fresh-trucked to frozen or dried. Frozen peas and corn were packed in July at July freight rates. A 1 lb bag ran us $1.19 at Aldi this week.

Fill the freezer on meat markdowns now rather than in November. Refrigerated trucking is the leg most exposed to the surcharge lag Ortega describes.

If you keep a stockpile list, put rice, beans, oats and canned tomatoes at the top; they are the categories with the smallest fuel share and the longest shelf life. Our stockpile guide has quantities for a family of four.

What it means for your cart: Fuel is a small share of retail food cost, and no source we found puts a current dollar figure on this month's pass-through. As a planning number only: if refrigerated freight adds 3-5 cents per pound to produce and 2-4 cents per gallon of milk over the next 60 days, a family of four spending $250 a week would see roughly $4-8 a week in fuel-driven increases, concentrated in fresh produce, dairy and meat. Treat this as a budget cushion, not a forecast; it moves with the EIA weekly number and with whether Hormuz traffic keeps rising. The calculator shows how much of your basket sits in those categories.

Editorial note: this brief was drafted with AI assistance from the sources below and checked by our editor before publication. Read How we work.

Sources

Frequently Asked Questions

Almost all food freight, farm machinery and refrigerated trailers run on diesel, not gasoline. Gasoline averaged $4.46 on September 18 (AAA), up less than diesel in percentage terms. A diesel spike reaches the shelf through freight surcharges and farm costs rather than through the family car.
Not in a measurable way. Reuters' sources on September 18 said retailers absorb short-term moves and many freight contracts have not yet repriced. The effect builds over the coming months and shows up first in produce, dairy and meat.
It means volumes through the strait rose over two weeks, per U.S. Central Command on September 19. Crude was still above $104 on September 18 and Iran says the strait is closed. Retail diesel typically lags crude by several weeks in both directions.
Rice, dried beans, flour, oats and canned goods. They ship dense, unrefrigerated and often by rail, so fuel is the smallest share of their cost. Our calculator lets you weight a weekly basket toward them.

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Rachel Whitfield
Rachel covers food economics, household budgeting, and consumer strategies for beating grocery inflation. She is the author of The Tariff-Proof Kitchen.

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