1. We here at Preferred Service CNG are Oklahoma State Certified to install CNG conversions.

2.  Working with compressed natural gas has been a career for us for a combined total of 30 years.  We have not just recently been introduced to natural gas and its characteristics. Every component from the vessel / CNG cylinder, tubing, regulator, coalescing filter, and more, we have been working with for years. Why trust your conversion to a company and techs that are new to high pressure natural gas and its characteristics? That could be dangerous!

3. The Techs at Preferred Service CNG also have made a life of repairing automobiles with a combined 47 years of automobile repair experience.  Our techs have the knowledge needed to integrate the computer controlled CNG conversion system with the computer controllled engine in the vehicle.