Engenious™ Engineering

Natural Gas and Alternative Fuel Diesel Engine Conversions
A Peaker Services, Inc. Company
Formerly Energy Conversions, Inc.

Price Comparison For Diesel vs. Natural Gas*

Price Date
Natural Gas

*Diesel Gallon Equivalent (DGE)
Data acquired from eia.gov

Estimated Annual Benefits for 710 Engine*

Description Fuel Annual Savings CO2 Reduction NOx Reduction PM Reduction
Long Haul Locomotive* 100% Natural Gas

5,303,000 lbs/yr 415,030 lbs/yr 3,859 lbs/yr
Long Haul Locomotive* Dual Fuel Diesel/NG

2,705,612 lbs/yr 359,270 lbs/yr 2,573 lbs/yr
Power Gen** 100% Natural Gas

7,070,666 lbs/yr 553,373 lbs/yr 5,145 lbs/yr
Power Gen** Dual Fuel Diesel/NG

3,607,483 lbs/yr 479,026 lbs/yr 3,430 lbs/yr

*Based on standard EPA Duty Cycle
**Based on 5,000 hrs/yr

All Estimates based on latest eia.gov fuel prices

Dual Fuel Engenious Engineering

Dual Fuel Conversions

Conversions of high horsepower diesel engines to dual fuel including natural gas, methanol, ethanol, diesel, ammonia, and hydrogen substitution.

Direct Injection

Direct Gas Injection

High pressure direct multi-point injection kits for optimum gas injection into combustion chamber for EMD engine conversions.

single point injection

Single-Point Injection

Air intake fumigated single-point injection kits for basic four-stroke engine conversions. 

100% Spark Ignited Engenious Engineering

100% Gas Spark Ignited Conversion

Spark ignited kit for EMD diesel engines achieves 100% diesel replacement.

Direct Injection Engenious Engineering

Multi-Port Injection

Port injection, multiple point injection kits for advanced four-stroke engine conversions. 


Low Emission Idle (LEI) System

Bank Deactivation System designed to fit EMD and GE mechanically-injected engines to reduce smoke under low load conditions.


Global Warming Reduction

Natural gas is a great bridge solution with one of the highest hydrogen to carbon ratios when compared with other fuels. A diesel to natural gas conversion reduces carbon emissions, nitrogen oxide (NOx), and particulate carbon emissions. 


Clean Burning Conversion System Kits

Dependable, reliable, safe, and equipped with full-power capabilities.


100% Natural Gas Conversion

EPA engine certification to Tier 3 capability with no exhaust after-treatment or exhaust gas recirculation (EGR) required.

Benefits of Dual Fuel Conversions

Direct Benefits
  • Fuel cost savings
  • Significantly reduced emissions in dual fuel and 100% gas modes
  • Retrofit system—expands capability and adds value to your present investment
  • Lower maintenance costs & improved engine longevity due to cleaner burning fuel
  • Retains diesel-only mode backup
  • Fuel flexibility reduces costs when fuel prices are volatile
Indirect Benefits
  • Reduces national dependence on foreign oil
  • Environmentally responsible technology
  • Shifts major fuel cost to a more price stable fuel source
  • Flexibility in storing fuel (i.e. diesel lasts 6-12 months in storage, natural gas lasts 20+ years)

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We’ve Been In Business For Over 50 years

Engenious™ Engineering, LLC is the recognized global leader in dual fuel conversions and alternative fuel retrofitting systems. Engenious™ Engineering is a subsidiary of Peaker Services, Inc., incorporated in 1971, and has been converting diesel engines to alternative fuels since its inception as Energy Conversions Inc. (ECI) in 1986.

Featured Projects

Burlington Northern Railroad

Burlington Northern Railroad

Minnesota, USA

Burlington Northern reduces NOx by 63% and CO₂ by 12% after dual fuel conversion.

US Navy Converts 645 EMD Engine

US Navy Converts 645 EMD Engine

Washington DC, USA

United States Navy reduces NOx by 77% and particulate matter by 40% after converting to dual fuel on stationary 645 EMD engine.

Napa Valley Wine Train

Napa Valley Wine Train

California, USA

100% spark ignited natural gas conversion with over 15 years of proven cost savings.

Contact Us


6411 Pacific Hwy. East Tacoma, WA 98484

(253) 312-7888

(253) 922-2258