Diesel at $5.65 a Gallon: Six Ways to Cut Fuel Costs on Your Equipment Fleet
According to Equipment World, diesel fuel is now averaging $5.65 per gallon nationwide as of May 5, 2026, a 60% increase from just one year ago, pushing the cost to fuel a midsize excavator past $500 per fill-up.
Why Prices May Stay High All Summer
The price spike is being driven by a combination of seasonal demand, geopolitical tensions involving Iran, and the approaching hurricane season, which can shut down Gulf Coast refineries. Many economists, according to Equipment World, predict fuel prices will remain elevated through the summer months, meaning field operators won’t see much relief any time soon.
Steve Nendick, marketing communications director for Cummins, offered a series of practical steps to reduce consumption and cut CO2 emissions. The recommendations span equipment maintenance, operator behavior, and fleet technology.
What It Means for Subcontractors
With margins already tight, fuel is one of the few operating costs you can actively control in the field. Here’s what Nendick recommends, as reported by Equipment World:
- Stick to maintenance schedules. Poorly maintained machines burn more fuel for the same output. Preventive maintenance reduces fuel costs and extends engine life.
- Use the correct fluids and check tire pressure. Follow OEM recommendations on fuel and oil types, keep fluid levels in spec, and verify tire pressure and air filter cleanliness regularly.
- Eliminate unnecessary idling. Idling wastes fuel, increases emissions, accelerates engine wear, and adds cost. Enable timed idle shutoff or stop-start features if your equipment supports them. Cummins offers both on its Stage V engines.
- Train your operators. Poorly trained operators tend to be more aggressive on equipment, directly increasing fuel consumption. As telematics improves, Nendick noted, fleet data will become a stronger tool for targeted operator coaching.
- Use telematics and monitoring data. Machines equipped with monitoring systems can surface fuel consumption patterns and detect service problems before they become downtime. Cummins’ Guidanz platform supports this on electronic engines, turning raw data into fuel-saving decisions.
- Drive at consistent speeds. Avoid quick acceleration and operate machines at steady, optimal speeds.
For subcontractors running multiple pieces of iron on a jobsite, even modest per-machine savings multiply quickly across a fleet. At $5.65 per gallon, small habits add up fast.
