GE’s Waukesha mobileFLEX gas engine and generator set portfolio with EPA Mobile Certification. The mobileFLEX portfolio is the latest advancement from GE to deliver lower-cost, lower-emission power to drill rigs, artificial lift enhanced oil recovery and oilfield equipment. An all-gas alternative to diesel units, mobileFLEX is an EPA mobile-certified solution that provides a cost advantage to energy producers and operational advantage to drilling contractors by utilizing field gases.

GE also provides a range of upgrades for the Waukesha products.

Targeted to the Specific Needs of Oil and Gas

The mobileFLEX’s rich-burn combustion provides low emissions and can operate on a range of field gases without deration.

Lower NOx Levels

Reduced NOx gives you more on-site horsepower with a smaller carbon footprint while still meeting site tonnage requirements.

Complete Control with ESM

mobileFLEX products feature GE’s Engine System Manager (ESM), an easy-to-use system that maximizes engine performance and uptime.

Waukesha mobileFLEX

For oilfield power applications, the mobileFLEX engine portfolio is a superior power solution for drill rigs, liquids reinjection, lift pumps, and temporary accommodations.

  • Lower operational costs up to 80 percent compared to diesel
  • Operates on LNG, CNG HD-5 propane and high-BTU field gases with minimal gas treatment
  • Operation on natural gases 950-1,650 BTU/ft3 HHV without component changes and on propane gas 2600 BTU/ft3 HHV without component changes







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Product Specifications

Waukesha mobileFLEX VHP7104GSI VHP L7044GSI VHP5904GSI VHP L5794GSI
Power kWb 1153 1153 947 947
Power kWe 1100   900  
BSFC  (kJ/kWh, MOB) (Btu/bhp-hr, EPA) 10884 10884 10606 10606
NOx (mg/Nm3 @ 5% O2, MOB) (g/bhp-hr, EPA) 185 185 185 185
CO (mg/Nm3 @ 5% O2, MOB) (g/bhp-hr, EPA) 444 444 667 667
NMHC (mg/Nm3 @ 5% O2, MOB) (g/bhp-hr, EPA) 74 74 56 56
Waukesha mobileFLEX VHP7104GSI VHP L7044GSI VHP5904GSI VHP L5794GSI
Power kWb 1253 1253 1029 1029
Power kWe 1200   980  
BSFC  (kJ/kWh, MOB) (Btu/bhp-hr, EPA) 7881 7881 7665 7665
NOx (mg/Nm3 @ 5% O2, MOB) (g/bhp-hr, EPA) 0.5 0.5 0.5 0.5
CO (mg/Nm3 @ 5% O2, MOB) (g/bhp-hr, EPA) 1.2 1.2 1.8 1.8
NMHC (mg/Nm3 @ 5% O2, MOB) (g/bhp-hr, EPA) 0.2 0.2 0.15 0.15

Fine print

Rating Standard: All models: Ratings conform to ISO 3046/1 (latest version) with a mechanical effi ciency of 90% and auxiliary water temperature, Tcra, as specifi ed in the Power Rating Chart, Bulletin 1079

(latest version) limited to ±10° F (±5.5° C). Ratings are also valid for SAE J1349, BS 5514, DIN 6271 and API 7B-11C standard atmospheric reference conditions.


  • These engines have HD-5 propane as a secondary fuel option: VHP–GL Series, VHP–GSI Series.
  • No overload allowed on all HD-5 propane ratings.
  • Requires a minimum of 34 WKI fuel.
  • Engine may require optional fuel system.

***I.C. Water Temp. (Tcra)130°F 54°C

Generator efficiences at 0.8PF