Photo by Becky May.

Photo by Becky May.

Here are several key terms to kinow when discussing natural gas fueling. Understanding them will help anyone sound like a pro when discussing natural gas including:

Fuel Types

Compressed Natural Gas (CNG)

  • The vehicle fuel tank is a high pressure (3,600 psi) cylinder.
  • A CNG vehicle gets about the same performance as a gasoline vehicle with only a slightly lower gasoline gallon equivalent (GGE).
  • CNG is used in light-, medium-, and heavy-duty vehicle applications.

Liquefied Natural Gas (LNG)

  • Produced by super-cooling natural gas to negative 260-degrees Fahrenheit in order to convert it to a liquid. LNG is typically used in heavy-duty truck applications.

Vehicle Types

Dedicated Vehicle

  • Designed to run only on natural gas

Bi-fuel Vehicle

  • Runs on either natural gas or gasoline, with two separate fueling systems connected the same internal combustion engine.

CNG Infrastructure Types


  • Drivers can fill up in the same amount of time as a gasoline vehicle.
  • Best suited for retail stations, where vehicles arrive in need of a quick fill, and CNG can be dispensed alongside gasoline.


  • May take many hours to fill up; the time depends on the number of vehicles fueling, compressor size, and storage.
  • Typically used for fleets with central refueling locations that allow vehicles to fill up overnight.

To read more about making the switch to natural-gas-fueled vehicles, click here.