Diesel Falls 4.3¢ to $5.596, Second Straight Week Down
DOE benchmark drops to $5.596/gal after five weeks of 20-cent swings. Futures tick up as Iran-war volatility eases.
The DOE/EIA retail diesel benchmark fell 4.3 cents per gallon to $5.596 in the week ending May 19, the second consecutive weekly decline and the lowest price in a month of wild swings.
Why did diesel drop this week?
The benchmark now sits just 1.2 cents above where it was April 13, but the path between those two points has been anything but stable. Since mid-April, the weekly price moved down 20.5 cents, down 5.2 cents, then spiked 28.9 cents before last week's 0.1-cent dip and this week's 4.3-cent drop. Fleets paying fuel surcharges pegged to the DOE number are back where they started five weeks ago, but settlement statements swung by as much as 29 cents per gallon in a single week during that stretch.
Futures markets showed relative calm Tuesday. Ultra low sulfur diesel on the CME traded at $4.1265 per gallon around 12:30 p.m. Eastern, up 0.29% on the day. Intraday volatility, the gap between the session's low and high, was about 10 cents per gallon. That's a narrow range compared to the swings seen since the Iran conflict began.
What the two-week decline means for fuel surcharges
Most fuel surcharge tables reset weekly based on the DOE benchmark. A 4.4-cent combined drop over two weeks translates to roughly $1.76 less per 100 gallons pumped, or about $18 per truck per week for a unit running 1,000 miles at 6 mpg. For a 10-truck fleet, that's $180 per week back in the operating account compared to two weeks ago, not transformative, but enough to cover a tire repair or a driver meal allowance.
The benchmark's return to near-April levels also means loads booked in mid-April with fuel surcharges locked to that week's rate are now priced almost identically to current fuel costs. Fleets that took longer-term contracts during the late-April spike, when diesel hit $5.74, are now paying 14 cents per gallon more at the pump than the rate their surcharge was calculated against, a gap that eats $5.60 per 100 gallons or $56 per 1,000-mile run.
Futures stability vs. retail whipsaw
The CME futures price of $4.1265 per gallon sits roughly $1.47 below the retail benchmark. That spread, the gap between wholesale futures and what a truck stop charges, has held relatively steady even as both prices bounced. The retail benchmark's 29-cent single-week spike in late April was mirrored in futures, and this week's 4.3-cent retail drop followed a similar futures move.
What changed is the size of the daily swings. A 10-cent intraday range on the futures board is manageable for dispatch planning. During the first weeks after the Iran conflict escalated, daily ranges hit 20 to 30 cents, making it nearly impossible to lock fuel costs for loads booked more than 48 hours out. The narrower range suggests traders see less immediate risk of another supply shock, though the retail price remains 50% higher than pre-conflict levels, a baseline that continues to pressure margins for fleets without strong fuel surcharge pass-through.
How long the decline lasts
The two-week drop follows a month of erratic movement tied to Middle East supply concerns and refinery utilization rates. Diesel inventories and refinery run rates, the two factors that typically govern retail prices outside of crude oil shocks, have not been reported in the source data, so it's unclear whether this decline reflects easing supply tightness or simply a pause in speculative buying.
What is clear: fleets are paying nearly the same per gallon as they were five weeks ago, but the path there burned planning hours and forced dispatchers to re-quote loads mid-week as fuel surcharges reset. The return to a narrower daily trading range on futures markets suggests the worst of the intraday volatility may be behind the market, but the retail price remains elevated compared to the $3.70-per-gallon range that prevailed before the conflict.
For small fleets, the two-week decline offers a narrow window to lock fuel purchases or negotiate surcharge floors with shippers before the next swing. The 10-cent daily futures range won't last if another supply disruption hits, and the retail benchmark's five-week round trip proves that current price levels can evaporate in a single DOE report.
