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Fleets in the future could have a limited role for internal combustion engine vehicles powered by e-fuels, according to software provider Fleetcheck.
The fuels, designed to be carbon neutral, have been suggested as a potential exemption from EU rules, currently under development, that could see petrol and diesel new car sales banned.
Fleetcheck managing director Peter Golding, however, warned that in his view the technology had limitations.
He said: "There is talk of e-Fuels being made by companies such as Porsche and Ferrari bringing about a stay of execution for the internal combustion engine and this might be true - but only if you own a Porsche or a Ferrari.
"The bottom line is that these fuels are very expensive and likely to remain so, while their claims to be carbon neutral are in some respects, highly questionable. They do not appear to be a serious mass market answer to the future of either CO2 emission reduction or clean air initiatives."
Despite this, Golding said e-fuels might have a role to play in fleet applications where electrification looked as though it could prove problematic, at least into the medium term.
He said: "We've recently been highlighting discussions that we've been having with fleets, looking at areas where replacing ICE vehicles with electric might just not be practical.
"Examples include 4x4s used by power companies in remote areas and ambulances, both of which might be needed around-the-clock in an emergency and do not recharge quickly.
"The fact is that these vehicles make up only a tiny part of the car parc and it is here that e-fuels might have a limited role to play. The resources required to electrify these 4x4s, ambulances and others would be considerable and e-fuels might make more sense, especially if the cost can be brought down from current levels."
Golding said that while hopefully battery technology would move to a point in the coming decades where electrification of these vehicles was practical, until then there would need to be stop-gap solutions.
He continued: "While e-fuels are far from perfect, they look to be a better answer in limited applications than current petrol and diesel options.
"It's interesting that the recent House of Commons Transport Committee report highlighted the need for pragmatic solutions to low carbon travel and highlighted e-fuels as an option that could well fall into that category."
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