Vehicle Availability

There are many natural gas vehicle options available from several original equipment manufacturers (OEM). These vehicles can be purchased from the dealership through a process that has been streamlined for the customer. Many other medium- and heavy-duty vehicle options are available through small vehicle modifiers (SVM). These companies manufacture conversion systems that have been certified and approved by the U.S. Environmental Protection Agency and/or the California Air Resources Board. These approved systems can be installed on new and used vehicles to run on natural gas.


The engines driving NGVs

Cummins Inc. currently offers the L9N, B6.7N, ISX12N, and new 15L X15N™ for fleets of all sizes and applications. All are built in America.

Outstanding features of the 15L X15N™:

  • Industry-first & market-defining Big Bore Natural Gas Powertrain
  • Capable to meet stringent CARB24/27 and future EPA NOx regulations
  • Compact 15 Liter – 500 lbs. lighter than current 15L diesels
  • Up to a 10% Fuel Economy/GHG improvement over ISX12N
  • 12L-15L Diesel matching ratings – up to 500hp & 1850lb-ft of torque
  • Over 1,000-mile range for line-haul applications
  • Carbon-negative outcome dependent on RNG source

Dependent on tank configuration and driving behavior

Source: California fleets fueling with bio-CNG have achieved negative carbon outcomes since 2020, reaching annual average carbon intensity scores of roughly -100 gCO2e/MJ or better since 2021

Manufacturers & Modifiers

    CALLOUT 18

    Fleet emissions calculator

    Compare emissions of commercially-available alternative fuel medium- and heavy-duty vehicles with the Heavy-Duty Vehicle Emissions Calculator (HDVEC) tool. Developed by the U.S. Department of Energy’s Argonne National Laboratory using its AFLEET Tool 2017, this online resource aids fleet managers and decision makers in comparing vehicle emission reduction options in order to maximize their state’s VW funding investment.