Can synthetic fuel save the internal combustion engine and its cars?

Porsche believes internal combustion engines using synthetic fuel, or eFuel, will make internal combustion cars as clean as an electric alternative.

A number of manufacturers have been looking at these "eFuels" and are hopeful they can be used in the near future as synthetic fuels would allow older cars to remain on the road without the need for any modifications to their engines while still benefiting from the same reduction in tailpipe emissions. 

There are different opinions on whether this will be a viable option in the near future due to scalability of production and regulations but many are optimistic as can be seen in a number of articles written about the new fuels.

Evo - Will Synthetic Fuel Save the Performance Car?

motor1 - Porsche Synthetic Fuel said to be as clean as EVs

Road and Track - Porsche Working On Synthetic Fuels

Porsche will produce its own synthetic fuel by 2022 | CAR Magazine

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