The Gap Gets Wider: Why Diesel Prices Are Hurting Trucking Companies

While crude oil prices have started to decline from their recent highs, diesel prices across the United States remain stubbornly elevated. This growing disconnect between crude oil and diesel costs is creating serious financial pressure for trucking companies, owner-operators, and small fleets already operating on thin profit margins.

By mid-April 2026, crude oil had retreated from the war-driven spikes linked to tensions around the Strait of Hormuz. Normally, lower crude oil prices would lead to cheaper fuel at the pump. However, diesel prices have not followed the same path. National retail diesel prices remain above $5.60 per gallon, while California continues to see diesel in the mid-$7 range.

For the freight industry, this price gap is more than just frustrating—it is becoming a major operational challenge.

Why Diesel Prices Are Staying High

Many people assume diesel prices move directly with crude oil, but the reality is more complex. Several market forces are keeping diesel expensive despite softer crude prices.

1. Tight Distillate Inventories

Diesel is part of the distillate fuel category, and current inventories remain below healthy seasonal levels. When supplies are tight, prices stay elevated regardless of crude market declines.

2. Refinery Disruptions

Unexpected refinery maintenance, reduced production capacity, and operational issues continue to limit diesel output. Refineries prioritize multiple products, and diesel supply can quickly tighten when disruptions occur.

3. Regional Supply Imbalances

Some states and regions face greater diesel shortages than others. California, for example, has unique fuel standards and limited refining options, which often result in significantly higher prices than the national average.

How High Diesel Prices Impact Trucking Companies

Fuel is one of the largest operating expenses in trucking. When diesel remains high, carriers feel the pressure immediately.

Large fleets may have negotiated fuel contracts or better cash flow management, but smaller carriers and owner-operators often pay full retail prices at the pump. That creates instant financial strain.

Fuel Surcharges Are Delayed

Many freight contracts include fuel surcharges, but those adjustments often lag behind real-time diesel increases. By the time surcharges catch up, carriers may have already absorbed weeks of higher fuel costs.

Spot Rates Are Not Rising Fast Enough

Although the freight market strengthened in March, spot market rates have not increased enough to offset rising operating expenses. That means revenue is improving more slowly than costs.

Cash Flow Challenges

Small trucking businesses commonly wait 30 days or more to receive payment after completing loads. Meanwhile, fuel, insurance, maintenance, and payroll expenses must be paid immediately.

This delay creates dangerous cash flow pressure, especially when diesel prices spike unexpectedly.

How Carriers Are Responding

Many trucking operators are already making difficult adjustments to survive.

Parking Trucks

Some owner-operators are temporarily parking trucks because running certain lanes no longer makes economic sense.

Reducing Speed

Others are lowering highway speeds to 65 mph or below to improve fuel efficiency. Even small gains in miles per gallon can make a noticeable difference over long distances.

Being More Selective With Loads

Carriers are choosing loads more carefully, focusing on freight with stronger rates, shorter deadhead miles, and better fuel economics.

What This Means for the Freight Market

When trucking margins get squeezed, capacity can tighten quickly. If enough small fleets reduce activity or exit the market, shippers may face higher transportation costs later in the year.

That creates a strange market dynamic: freight demand may improve, but available truck capacity may shrink because operating costs are too high.

For brokers, shippers, and carriers alike, monitoring diesel prices is now just as important as watching freight volume.

Looking Ahead

If crude oil remains lower and refinery output improves, diesel prices could eventually ease. However, until inventories rebuild and supply chains stabilize, trucking companies may continue facing expensive fuel.

The freight market showed signs of strength in March, but operating costs strengthened faster. For many carriers, especially small businesses, that leaves little room for error.

In 2026, success in trucking may depend less on how many loads you haul—and more on how efficiently you manage fuel, cash flow, and margins.

Image Alt Text:

Truck parked at a diesel station, with rising fuel prices affecting trucking profits in 2026.