November 8, 2026. 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 (EIA). 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.
The webinar “The Diesel Premium: Making the Business Case for CNG and RNG” (December 8, 2026 at 1:00pm ET / 10:00am PT) 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.
Participants will 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 compared to diesel.
- How back-of-cab and side-mount fuel systems maximize onboard fuel capacity, enabling up to 1,200 miles of range and supporting the demands of long-haul Class 8 operations. Explore how North America’s established and growing CNG fueling network supports Class 8 fleets, with convenient fueling access and contracted pricing for greater cost predictability.
- How RNG helps fleets reduce their carbon footprint, how state low-carbon fuel programs can strengthen the business case, and what the 2027 EPA engine standards mean for natural gas trucking.
- Q&A with the speakers on tank configuration, fueling access by corridor, maintenance differences and payback.
Webinar speakers will be Ian MacDonald, SVP of Sales, Americas, Hexagon Agility; Todd McCarthy, General Manager, Fuel Sales, Love’s Alternative Energy; and Henry Pines, Director, Strategic Initiatives, Clean Transportation Solutions Team, TRC.
The event will be sponsored by Hexagon Agility and Love’s Alternative Energy.