Brent Crude Hits $97 as Iran Fighting Intensifies

Why did oil prices jump this week?

Brent crude, the international standard, climbed 1.8% to $97.33 per barrel September 3. Benchmark U.S. crude rose 2.1% to $92.92 a barrel. The move follows intensified fighting in Iran, which has kept upward pressure on crude markets since the Strait of Hormuz tensions began choking supply in June.

The $97 Brent mark is the highest close since mid-June, when crude briefly touched $92 before falling back to $80 on easing supply fears. That relief proved short-lived. The latest spike erases the summer pullback and puts crude within $3 of the multi-year highs hit in early June, when Hormuz doubts first drove Brent above $92.

What the crude move costs a small fleet

Diesel typically tracks Brent with a lag of one to three weeks. At $97 Brent, retail diesel in most U.S. markets runs $4.20 to $4.60 per gallon, depending on regional refining capacity and state taxes. A five-truck fleet running 500 miles per day per truck at 6 mpg burns roughly 417 gallons per day. At $4.40 per gallon, that's $1,835 daily in fuel, or $550,500 annually. Every 10-cent move in diesel costs that fleet $15,200 per year.

Fuel surcharges have not kept pace with the crude rally. Most contract FSCs reset weekly or biweekly based on the DOE national average, which lags spot diesel by five to seven days. Spot-market loads often carry no FSC at all, leaving owner-operators to eat the difference between the rate they locked in and the pump price they pay three days later.

Why this crude rally sticks

The June spike unwound when traders bet on a diplomatic resolution and OPEC+ raised output quotas. Neither materialized. The Hormuz closure remains in place, and OPEC+ quota increases mean nothing while the strait stays shut. Middle East crude that would normally move by tanker through Hormuz is landlocked, forcing buyers to bid up West Texas Intermediate and other non-Middle East grades.

U.S. refineries responded by running flat out. Refinery utilization hit 17.4 million barrels per day in late August, the highest rate since 2019, but that output barely covers domestic diesel demand and leaves no cushion for export commitments. Cushing crude inventories, the bellwether for U.S. supply tightness, fell near minimum operating levels in June, signaling refiners are drawing down every available barrel.

The Trump administration announced a Venezuela oil deal in early September aimed at cutting fuel prices and refilling the Strategic Petroleum Reserve, but volume and timing remain unclear. Until Venezuelan barrels actually hit the Gulf Coast, the deal offers no near-term relief.

The bill for owner-operators

An owner-operator running 2,500 miles per week at 6 mpg burns 417 gallons. At $4.40 per gallon, weekly fuel cost is $1,835. At $4.00 per gallon, the same miles cost $1,667. The 40-cent difference is $168 per week, or $8,736 per year. That gap wipes out the profit margin on roughly 35 to 40 loads per year for a typical dry van O/O grossing $1.80 per mile all-in.

Spot rates have not risen to offset the fuel spike. DAT's van rate averaged $1.92 per mile all-in in late August, up 3 cents from July but still 18 cents below the same week in 2025. Contract rates remain flat, with most annual bids locked in at fuel assumptions pegged to $3.60 to $3.80 diesel. Carriers who signed those contracts in Q1 are now underwater on fuel by 60 to 80 cents per gallon.

Small fleets with older equipment face a double hit. Pre-2010 trucks average 5.5 mpg or worse, burning an extra 35 gallons per week compared to a 2020 model at 6.5 mpg. At $4.40 per gallon, that's $154 per week, or $8,000 annually, in fuel penalty before the crude rally is factored in. Tire costs are also climbing as natural rubber nears a 10-year high and synthetic rubber feedstock tracks crude oil, compounding the cost pressure on fleets running older iron.

What changes for dispatchers

Lane selection matters more at $97 crude than at $80. Backhauls that pencil at $1.60 per mile when diesel is $3.80 lose money at $4.40. Dispatchers should recalculate breakeven on every lane and avoid moves that require more than 100 deadhead miles unless the loaded rate clears $2.00 per mile all-in.

Short-haul and regional work becomes more attractive relative to long-haul when fuel spikes. A 250-mile run at $2.20 per mile generates the same net as a 600-mile run at $1.90 per mile when fuel is $4.40, but the short run turns faster and exposes the truck to fewer hours of fuel price risk. Fleets with the flexibility to shift from OTR to regional should consider it until crude settles.

Fuel cards with volume discounts or pump-price locks deliver real savings in a volatile market. A 10-cent-per-gallon discount on 400 gallons per week is $40 per week, or $2,080 per year per truck. Fleets without negotiated fuel programs are leaving money on the table.