New Dual-Fuel Natural Gas System for Class 8 Trucks Attains EPA Certification


Skygo Fuel Systems says it has received U.S. Environmental Protection Agency (EPA) certification for its dual-fuel natural gas conversions of model-year 2007 to 2009 Cummins ISX engines.

The ISX is a 15-liter engine that has long been widely used in heavy-duty over-the-road trucking. The Skygo system – which adds natural gas to the incoming air stream of a diesel engine in order to enhance combustion and reduce diesel fuel use – can now be integrated as an aftermarket option for outside-useful-life applications. The company says the system offers a diesel replacement rate of up to 60%, and it is compatible with either compressed natural gas (CNG) or liquefied natural gas (LNG) fuel systems.

Skygo has developed a partnership with heavy-duty engine equipment manufacturer AMBAC International to manufacture the system in its facility in Columbia, S.C.

‘We are very excited about this technology and our partnership with Skygo,’ says Robert Isherwood, vice president and director of product development for AMBAC International. ‘The advantages this system provides to the transportation industry globally are great.’

Skygo notes that it is also working on a variation of its dual-fuel natural gas system for Detroit Diesel Series 60 engines.

For more information about Skygo's technology, send an email to Michael Kilbourne at

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