The U.S. average retail price for on-highway diesel reached $6.35 a gallon the week of October 26, up $2.63 from the same week a year earlier, according to the Energy Information Administration. Where a fleet operates has a greater impact on that number than nearly any factor within a fleet manager’s control. During the same week, EIA reported diesel prices of$8.155 per gallon in California, compared with $5.89 in the Lower Atlantic region.
Fleets have noticed.
Natural gas prices have moved on a different track. The DOE Clean Cities and Communities Alternative Fuel Price Report put the national average for CNG at $3.50 per diesel gallon equivalent in July 2026, $1.36 below diesel, and the gap in the West Coast region at $2.12.
This webinar explores what these numbers mean for a Class 8 fleets: from fuel costs and operating range to fuel system technology, fueling infrastructure, and supply agreements—and how they impact the business case for making the switch to natural gas.
What You’ll Learn:
- How CNG and RNG prices compare to diesel today, how the fuel cost spread has moved over the past four quarters, and why natural gas offers greater price stability and predictability compare...