Clark: When diesel spikes, fuel efficiency helps control costs

Whether you’re a carrier or a private fleet, fuel is likely your highest operating expense (other than salaries). So, when diesel prices soar, profitability drops. A recent Reuters article laid it out in detail:

“As of Monday, U.S. fleets on average spent $5.52 per gallon on diesel, surpassing the prior all-time high of $5.50 set in June 2022 after Russia invaded Ukraine, according to data from fleet management technology provider Samsara.”

The article further noted that there was little to no relief in sight, despite the current ceasefire. As Reuters quotes Jason Miller, a supply chain professor at Michigan State University, “Not one firm had $5.60 a gallon diesel on their proverbial budget bingo card for 2026.”

And since oil is a global commodity, its price is tied to the overall market, regardless of how much is refined in the U.S. Since commercial fleets operate on tight margins (which get even tighter during a freight recession like we’re experiencing now), it’s vital that fleet operators determine how to mitigate the impact of rising prices by improving fuel efficiency.

Fuel cost mitigation strategies for fleets facing high diesel prices

Looking for alternative-fuel trucks to reduce dependence on diesel is not something that will happen in the near future. But help is available through an increasing number of telematics and other data-driven tools. So, what can you do now to improve fleet efficiency?

Fuel management systems improve diesel cost control and fleet visibility

Modern fuel management platforms give fleets real-time visibility into consumption patterns, idle time, and purchasing behavior. With the right system in place, operators can quickly identify anomalies, such as excessive idling, unauthorized fuel purchases, or underperforming equipment. These tools also allow fleets to benchmark performance across vehicles and drivers, making it easier to implement targeted improvements. Over time, even small adjustments driven by data insights can translate into significant cost savings.

Route optimization software reduces empty miles and fuel consumption

Empty miles and inefficient routing quietly erode margins. Advanced routing software uses real-time traffic data, weather conditions, and delivery windows to map the most fuel-efficient paths. Beyond simply reducing distance, optimization tools reduce exposure to congestion and unnecessary stops, both of which burn fuel. For fleets operating in regional or last-mile environments, dynamic routing can deliver immediate gains, while long-haul operations benefit from better load planning and reduced deadhead miles.

Tire maintenance programs improve MPG and reduce rolling resistance losses

Tires are one of the most overlooked contributors to fuel efficiency. Underinflated tires increase rolling resistance, forcing engines to work harder and consume more fuel. Regular pressure checks, proper alignment, and timely replacement of worn tires can improve fuel economy by several percentage points. Implementing automatic tire inflation systems or scheduled maintenance checks ensures consistency and removes guesswork, particularly in larger fleets where manual inspections can be inconsistent.

Predictive maintenance tools prevent fuel waste from engine inefficiencies

Reactive maintenance is costly not just in repairs but also in lost efficiency. Poorly maintained engines, clogged filters, and worn components all contribute to increased fuel consumption. Predictive maintenance leverages telematics and diagnostic data to identify potential issues before they lead to breakdowns or inefficiencies. By addressing problems early, fleets can keep vehicles operating at peak performance while avoiding the fuel penalties associated with neglected equipment.

Driver coaching and behavior monitoring reduce fuel consumption and idle time

Driver behavior has a direct and measurable impact on fuel consumption. Practices like aggressive acceleration, hard braking, and excessive idling can significantly reduce miles per gallon. Training programs that focus on smooth driving techniques, optimal cruising speeds, and idle reduction can deliver immediate improvements. Many fleets are also turning to in-cab coaching and scorecards to reinforce good habits and create accountability. When drivers understand how their behavior affects both fuel costs and overall profitability, they’re more likely to adopt efficient practices.

The bottom line for fleet operators

There’s no quick fix for high diesel prices, and fleets shouldn’t expect relief from global markets anytime soon. But while you can’t control the cost per gallon, you can control how efficiently every gallon is used. By combining data-driven tools, disciplined maintenance practices, and well-trained drivers, fleets can chip away at fuel waste and protect their margins—even in a challenging rate environment. In today’s market, efficiency isn’t just a competitive advantage; it’s a necessity for survival.