
Rising fuel costs do not have to be a fixed line item. GES designs and installs CNG systems for commercial fleets, school buses, industrial operations, and transit agencies across Oklahoma, backed by over 1,500 vehicle conversions and 100 fueling stations installed statewide.

Compressed natural gas burns cleaner than diesel and typically costs a fraction of the price per gallon equivalent. For any operation running a vehicle fleet - school buses, transit buses, industrial transport, work trucks - CN systems offer one of the clearest cost-savings cases in energy. With over 500 vehicle conversions and more than 100 fueling stations installed across Oklahoma, GES has the track record to back that claim up.
The savings on CNG go beyond fuel cost per gallon. Compressed natural gas burns cleaner, which reduces engine wear over time and can extend the service life of your vehicles. For school districts, municipalities, and commercial operations managing large fleets, that combination of lower fuel costs and reduced maintenance expense adds up to a meaningful impact on the bottom line year after year.
GES handles the complete process: site evaluation, equipment selection, installation, and commissioning. We work with fueling station infrastructure and vehicle systems alike, giving fleet managers a single point of accountability instead of juggling multiple contractors. Whether you are converting an existing diesel fleet, building out a new fueling station, or evaluating CNG for the first time, GES coordinates every phase of the project from start to finish.
For organizations that have already made the switch to CNG, many find that the experience opens the door to a broader conversation about geothermal heating and cooling for their facilities, because the savings mindset that drives one good energy decision tends to drive the next one too.
If you're evaluating CNG for your fleet or operation, here are the questions we hear most.
In many cases, yes. Natural gas automobile conversion is a proven approach for extending vehicle life while dramatically reducing fuel costs. Suitability depends on vehicle age, make, model, and operational requirements. GES evaluates this during our initial site and fleet assessment.
The conversion process begins with a vehicle assessment to confirm compatibility and determine the right equipment configuration for your make, model, and operational requirements. From there, GES installs the CNG fuel system components, and integrates them with the existing engine. Once installed, the system is tested, inspected, and commissioned before the vehicle returns to service. Most conversions are completed with minimal downtime, and GES coordinates the full process from evaluation to handoff.
Timelines vary based on the scope of the project - fleet size, fueling infrastructure requirements, and permitting. GES coordinates the full process, and we set realistic expectations at the start. We do not quote timelines we cannot keep.
The savings depend on your current fuel costs and fleet size, but school districts running CNG fleets consistently report significant per-mile savings over diesel. We provide a straightforward cost and savings analysis as part of the evaluation - not a sales pitch, just the numbers.
Yes. GES coordinates fueling station design and installation as part of CNG projects where needed. Full-service capability means you have one point of contact for the entire system - from vehicle conversion to fueling infrastructure to commissioning and training.