Save 20 to 30% on fuel consumption lowering your carbon emissions foot print. Can be fitted onto all your natural gas prime movers, how it works - The Motive Lean-burn fuel sytem is an OEM-quality closed-loop fuel sytem designed to retrofit on to mechanical open-loop gasgeous fuel system to provide optimal and consistent fuel control for improved engines performance, thermal efficency and Lower Fuel Consumption . The system use a Wide-Range exhaust gas oxygen sensor as feedback which allows the air/fuel ratio to be precisely controlled to lean setpoints as composition and operating conditions change.