The war in Iran continues to pressure the U.S. trucking sector. According to 3PL provider TA Services, Q1 2026 spot load requests grew 70% year-over-year, outpacing available capacity and signalling an unsettled freight market. Diesel climbed more than 20% month-over-month; with contract-rate negotiations failing to keep up with rising fuel costs, carriers have become more selective about long, fuel-intensive routes.
TA Services VP of Brokerage Operations Jerad Dennis said: "The market has already tightened significantly, and we see this as a structural shift rather than a short-term fluctuation." Crude oil hikes obviously hit operating costs, but pressure is broader. Urea — over half supplied from the Persian Gulf — is critical for refining diesel to meet legal air-pollution standards.
The U.S. West Coast faces additional strain: closures of Phillips 66's Los Angeles refinery and Valero's facility near San Francisco have cut California's total refining capacity by 17.5%. While average diesel prices eased slightly in late April, strong demand from construction, manufacturing and energy left fewer trucks for industrial goods like steel; flatbed rates rose, with dry van and reefer rates beginning to follow.
Fleet Advantage data show diesel is up 45% since the Iran war began, exacerbating the financial penalty of running older vehicles. Per TLDI estimates, a fleet of 100 2022-model trucks will spend over $1.2 million more annually than one running with 2028 equipment. Fleet Advantage SVP Brian Antonellis said: "The surge in diesel prices we're witnessing today doesn't create a new problem; it dramatically accelerates an existing one."
Key Takeaways:
1. U.S. diesel prices are up 45% since the Iran war started.
2. Q1 2026 spot load demand rose 70%; contract rates can't keep up with fuel costs.
3. Phillips 66 LA + Valero SF refinery closures cut California capacity by 17.5%.
4. Urea is critical for diesel refining; over half supplied from the Persian Gulf.
5. Fleet Advantage: a fleet of 100 2022 trucks costs ~$1.2M more per year than 2028-model equipment.
[43971]
