Diesel Jumps 29 Cents in One Week — Futures Signal More Pain Ahead

Why did diesel spike 29 cents this week?

The Department of Energy's weekly retail diesel benchmark jumped 28.9 cents per gallon to $5.64/g in the week ending May 5 — the sharpest single-week climb since the post-war high in early April. The increase erases virtually all of the decline recorded over the prior three weeks. DOE diesel stood at $5.643/g on April 6, the recent peak. This week's price sits just three-tenths of a cent below that mark.

The retail surge follows an even steeper move in futures. Ultra low sulfur diesel for June delivery on the CME settled at $3.7943/g on April 27. Five trading days later, on May 4, it closed at $4.0723/g — a 27.8-cent gain driven by the collapse of the early April ceasefire and continued blockages in the Strait of Hormuz. The retail benchmark has not yet fully absorbed that futures rally, meaning another leg up in pump prices is likely when the DOE survey catches up.

What this means for fuel surcharges and settlement statements

Most carrier fuel surcharge schedules key off the DOE weekly average. A 29-cent jump translates directly to higher FSC revenue per mile — but only if the shipper or broker contract honors the index without a lag or cap. Owner-operators on percentage-of-linehaul deals see no automatic offset unless they renegotiate the split. For a truck running 2,500 miles per week at 6 mpg, this week's diesel move alone adds $120 to the fuel bill before any FSC adjustment.

The April 6 high of $5.643/g already pushed many small fleets into negative margin on older contract lanes that hadn't repriced since early 2025. This week's return to that threshold — with futures signaling more upside — means lanes that were breakeven in March are now underwater unless spot rates or FSC schedules have moved in tandem. They largely have not. Spot rates remain soft across most corridors, and contract rates have been flat for three consecutive months in many segments.

Analysts warn inventories masking a supply crunch

The price spike is occurring even as analysts caution that the worst may still be ahead. Diesel inventories have absorbed much of the supply disruption caused by Hormuz blockages and refinery outages, but those buffers are finite. Several market observers noted that daily retail diesel prices tracked by AAA climbed 19.2 cents per gallon between April 27 and early May, and overnight futures trading added another 5 cents. The combined move puts retail diesel within striking distance of the Biden-era record of $5.689/g set in mid-2022.

The gap between futures and retail also signals that pump prices have further to climb. When ULSD futures jump 28 cents in a week but retail only reflects 29 cents over the same period, the lag means the next DOE survey will likely capture another significant increase. Futures markets price in expectations; retail surveys report what drivers paid days earlier. The spread between the two has widened, and that spread eventually closes at the pump.

How long can inventories hold?

Inventory draws have kept diesel flowing despite supply-chain stress, but the pace is unsustainable. Refiners have not been able to rebuild stocks while Hormuz remains partially blocked and several Gulf Coast facilities remain offline following storm damage in late March. The ceasefire that briefly eased crude flows in early April has collapsed, and tanker traffic through the strait remains well below normal. Each week of continued disruption pulls more barrels out of storage with no clear path to replenishment.

Small fleets have limited tools to hedge fuel exposure. Larger carriers with fuel-hedging programs or fixed-price contracts can lock in costs months ahead, but a 10-truck operation typically buys diesel at the pump with a fuel card tied to the daily rack price. When diesel climbs 29 cents in a week, the only immediate lever is to park trucks on lanes where the math no longer works — which tightens available capacity but does nothing for the fleet's revenue if freight demand remains soft.

The fuel-rate mismatch tightens margins

Diesel at $5.64/g would be manageable if spot rates had climbed in parallel. They have not. Spot rates in most lanes remain depressed by weak freight demand and excess capacity. The combination — high fuel costs, flat or declining linehaul rates — squeezes the per-mile margin from both sides. A lane that paid $2.20 per mile all-in last year might still pay $2.20 today, but fuel now consumes 40 cents more of that dollar than it did in March.

Contract carriers with fuel surcharge clauses fare better, but only if the FSC formula updates weekly and applies to 100 percent of miles. Many contracts cap FSC at a ceiling or apply it only to loaded miles, leaving deadhead fuel exposure entirely on the carrier. For fleets running high deadhead percentages — common in regional LTL and specialized freight — the fuel spike hits harder than the DOE average suggests.

What comes next

Futures markets are pricing in further gains. The 28-cent jump in five trading days reflects trader expectations that supply conditions will worsen before they improve. If Hormuz blockages persist and refinery capacity remains constrained, diesel could test or exceed the $5.689/g Biden-era high within weeks. The DOE benchmark updates every Monday; the next reading will show whether the futures rally that began April 27 has fully translated to retail, or whether another leg up is still coming.

Small fleets should review fuel surcharge schedules now — confirm the index, the update frequency, and whether deadhead miles are covered. On lanes where FSC lags or caps out, the only hedge is to reprice the linehaul or walk. Diesel at $5.64/g is not a temporary spike if the underlying supply problems remain unresolved, and analysts are warning that inventories cannot mask the shortfall much longer.