# Diesel hits record highs as Iran war shocks economy

> Transport companies warn of earnings drops as fuel costs surge 70% in a year, threatening inflation across the supply chain.
- Title: Diesel hits record highs as Iran war shocks economy · CNBC
- Summary: Transport companies warn of earnings drops as fuel costs surge 70% in a year, threatening inflation across the supply chain. Diesel prices at all-time highs…
- Keywords: diesel prices, iran war, transportation sector, j.b. hunt, norfolk southern, fuel costs, supply chain, inflation, trucking industry, rail transport, economic impact, business
- Source: CNBC — https://cnbc.com/2026/09/16/transport-economy-diesel-prices-iran.html
- Author: Alex Harring
- Published: 2026-09-16T16:57:42+00:00
- Read time: 1 min
- Topics: diesel prices, iran war, transportation sector, j.b. hunt, norfolk southern, fuel costs, supply chain, inflation, trucking industry, rail transport, economic impact, business
## Diesel hits all-time record
Diesel fuel reached $6.31 per gallon on Wednesday, an all-time high. Prices have jumped more than 70% in the past year due to the U.S. war with Iran.

> We have seen some of the most radical and abnormal swings in fuel prices that I think we've ever seen.
## J.B. Hunt warns of earnings drop
Trucking company J.B. Hunt expects earnings to fall 5% to 10% from Q2 to Q3 due to fuel costs. Its stock dropped 13% on Wednesday, one of its worst days since going public in 1983.
## Prices could hit $7 in midwest
The national average could exceed $6.50 within two days. Midwest states like Michigan, Ohio and Illinois may see diesel reach $7 per gallon soon.
## California already at $8 per gallon
California's average diesel price has already surpassed $8 per gallon, climbing nearly 20% in just one month. Norfolk Southern's chief called it like science fiction.

> We're talking about $6 diesel, but out here, it's $8 diesel, which is like science fiction.
## Transport sector worth $1.9 trillion
Transportation services added $1.9 trillion to the U.S. economy in 2024, accounting for over 6% of total GDP. Higher fuel costs threaten this critical sector.
## Harvest season amplifies crop costs
Diesel spikes hit during fall harvest, ballooning costs for corn and wheat producers. Economists warn this could eventually raise grocery and restaurant prices for consumers.
## Autonomous trucks could gain traction
Analysts suggest rising fuel prices could accelerate demand for autonomous trucking and electric freight solutions as companies seek cost alternatives.
## Key takeaway

Diesel prices at all-time highs are squeezing trucking and rail companies, which could eventually raise costs for groceries and consumer goods.