• EPA Certified CNG systems now available for the
      GMC/Chevrolet 5.3 L Ecotec3 Direct Injection engines
    • Now offering diesel conversions
    • More than 400 vehicles converted to CNG
    • Newly converted Ford F-150 Platinum
    • Ford F-150 5.0L Prins Conversion System - EPA Approved
    • Ford F-250 Conversion in Process
    • Steel Toolbox Tank Cover for Ford F-250 Conversion
    • One of our fleet conversions to CNG
    • Ford Connect Converted to CNG
    • Ford Transit Connect Tank Mount at back of body
    • 19" x 60" 24.5 Gas Gallon Equivalent (GGE) Type 4 CNG Tank - 136 pounds
    • Jeep Converted CNG
    • SUV Tank Mount
    • Ford Expedition Tank Mount with Carpeted Cover
    • Ford Expedition CNG Tank Mount - 11.8 GGE Type 3 Tank
    • Utility Bed Truck Converted to CNG
    • GMC Sierra 1500 5.3L Converted to CNG
    • Dual tank extended range - 700 miles
    • Ford F150 Propane Conversion Tool Box Tank Mount - 28 Gallon
    • Ford F350 Diesel with CNG Blend Kit
    • Tank cover fuel nozzle mount
    • 2014 Toyota Highlander CNG Conversion
    • 2014 Toyota Highlander CNG Bi-Fuel Conversion
    • 2014 Toyota Highlander Tank Mount - 15 Gallon CNG Tank


We've moved!
Our new address:
714 Enterprise Drive.
Edmond, OK 73013

We offer full conversion services through our authorized service centers, and informative interactive resources to help you through the conversion process.

Please contact us for an in-depth evaluation to determine which fuel makes the most sense for you.

Learn More

Welcome to CNG Interstate

CNG Interstate is the leading authority for compressed natural gas and propane conversions in the state of Oklahoma. We feature Prins CNG and Propane Conversion Systems and are the Oklahoma distributor for Quantum CNG Tanks.

CNG Interstate provides clean fuel services and informational resources. We offer natural gas and propane conversions for most vehicles used by individuals, or organizations with small to large fleets.

Our compressed natural gas and propane systems do not change the current fuel injection system and do not tamper with the Federal Emission Standards. The bi-fuel setup allows a vehicle to run on gasoline or switch over to natural gas or propane with the press of a button on the dashboard.