| Conversion Shop | Contact |
| Action Alternative Fuels | 2909 S. Classen Boulevard Norman, OK 73071 405-360-3835 |
| Bradshaw CNG Conversions L.L.C. | 403 W.2nd Avenue, Suite 109 Owasso, OK 74055 918-376-2992 |
| Bradshaw CNG Conversions L.L.C. | 214 W Oklahoma Okarche, OK 73762 405-263-7252 (service) 866-242-4952 (service, toll-free) |
| Clear Sky CNG | 3920 NW 39th Street Oklahoma City, OK 73112 405-601-3150 |
| CNG Auto Repair & Conversions | 9950-A E 55TH PL Tulsa, OK 74146 918-392-3472 |
| Frontier Chevrolet | 1606 E HWY 66 El Reno,OK 73036 405-262-3355 |
| Gratec: Alternative Fuels Division | 2448 E 81st Street Suite 4050 Tulsa, OK 74137 918-236-3983 |
| Jim Norton Ford | CNG/Fleet/Commercial Dept. 1101 SW Expressway Broken Arrow, OK 74012 918-259-6429 |
| Let's Go CNG, LLC | 1211 SE 29th Street Oklahoma City, OK 73129 405-677-5400 |
| OEM Systems, LLC | 210 West Oklahoma Avenue Okarche, Ok 73762 405-263-7488 405-263-7502 (fax) |
| Oklahoma Natural Gas | 4901 N. Santa Fe Avenue Oklahoma City, OK 73118 405-556-6442 405-556-6467 (fax) |
| Performance CNG, LLC. | 7101 Duffy Road Lexington, OK 73051 405-990-8153 |
| Preferred Service CNG LLC | 514 N.W. 94th Street Oklahoma City, OK 73114 405-406-5617 |
| TeamOne Automotive | 505 N Walnut Avenue Broken Arrow, Ok 74012 918-251-0018 |
| Tulsa Gas Technologies | 4809 S. 101st E. Avenue Tulsa, OK 74146 918-665-2641 |