Brent Crude Dips to $105.44 as Iran War Drags On With No End in Sight
Oil fell 19 cents May 14 after a week of whipsaw moves — diesel still sits near $4.48, and small fleets are watching every penny.
Brent crude fell 19 cents to $105.44 per barrel May 14, the latest tick in a month-long oil price roller coaster driven by the Iran conflict and Strait of Hormuz closure.
Why did oil prices drop despite the ongoing Iran war?
The 19-cent decline came as traders absorbed the reality that the conflict has no clear resolution timeline. After spiking to $111.43 in early May when the Strait of Hormuz first closed, Brent has swung between $97.38 and $107.72 over the past two weeks as peace talks stalled, resumed, and collapsed again. The May 14 dip reflects market fatigue with the uncertainty rather than any fundamental easing of supply risk — roughly 20% of global oil still flows through Hormuz when the strait is open, and that route remains shut.
What the $105 oil floor costs a small fleet
Diesel has held near $4.48 per gallon nationally for three weeks, even as crude bounces. A five-truck fleet running 500 miles per day at 6 mpg burns 417 gallons per day. At $4.48, that's $1,868 daily in fuel — $56 more per day than the $4.35 diesel price that prevailed before Hormuz closed in late April. Over a 22-day billing cycle, the Iran war premium costs that fleet $1,232 in fuel alone, before accounting for any fuel surcharge recovery lag.
Owner-operators on percentage splits feel the pinch harder. A 70/30 split on a $2,200 load nets the driver $1,540 before fuel. If the run burns 150 gallons, fuel now eats $672 of that — 44% of gross, up from 40% when diesel sat at $4.10 in March. The four-point margin compression turns a marginal lane into a money-loser.
The whipsaw pattern since Hormuz closed
Brent crude has moved more than 3% in a single session four times since May 1. It jumped 11% the week ending May 1 as the conflict escalated, fell 5.7% May 6 on ceasefire rumors, then climbed 3.5% May 12 when talks collapsed. The May 14 dip is the smallest single-day move in two weeks, suggesting traders are pricing in a prolonged stalemate rather than betting on imminent resolution or further escalation.
That volatility makes fuel budgeting nearly impossible for small fleets. Fuel surcharges typically lag spot diesel prices by one to two weeks, so a carrier locking in a load today at a surcharge pegged to last week's $4.45 diesel will eat the difference if pump prices jump to $4.60 by the time the truck fuels. The reverse also applies — when diesel drops sharply, as it did May 6, the surcharge overpayment flows to the carrier, but those windfalls have been rare this month.
No relief in sight for diesel costs
Crude oil is the largest input cost for diesel refining, and the $105 Brent floor keeps diesel elevated even when refining margins compress. Diesel crack spreads — the difference between crude and refined product prices — have tightened slightly in May as refineries ramp up summer production, but that margin relief hasn't translated to pump-price drops because the crude input cost remains 40% higher than the $75 Brent average that prevailed through most of 2024.
The Iran conflict shows no signs of resolution. Peace talks have stalled three times since early May, and the Strait of Hormuz remains closed to commercial tanker traffic. Until that route reopens or alternative supply routes absorb the lost volume, crude is likely to hold above $100 per barrel, keeping diesel above $4.40 nationally.
What small fleets are doing to manage fuel costs
Fleets with fuel cards tied to network discounts are seeing 8 to 12 cents per gallon off pump in some markets, which shaves $33 to $50 per day off a five-truck operation's fuel bill. Owner-operators are clustering fuel stops in states with lower diesel taxes — a fill-up in Missouri at $4.32 per gallon saves $24 over the same 150-gallon purchase in California at $4.48, enough to cover a meal.
Some small fleets are also renegotiating fuel surcharge terms with shippers, pushing for weekly index updates instead of biweekly to close the lag gap. That shift requires leverage — a fleet with consistent lane coverage can ask, but a spot-market operator has less room to negotiate.
The bill for a 10-truck fleet
A 10-truck fleet running 1,000 miles per day per truck at 6 mpg burns 1,667 gallons daily. At $4.48 per gallon, that's $7,468 per day in fuel, or $164,296 over a 22-day billing cycle. If diesel were still at the $4.10 April average, the same operation would spend $150,370 — a $13,926 monthly difference. That gap is roughly the gross revenue from six to seven spot loads at current van rates, meaning the Iran war premium effectively erases a week's worth of work for the fleet.
