Depends on Gasoline, doesn't it. And it SUCKS. I'd rather drive a 6.1 hemi V8 that has had it's compression upped to about 17:1 and burns cheap ethanol $1.04 a gallon (wholesale) and puts out 600hp of raw wheel smoking horsepower. (and is environmentally friendly to keep the geeks off my back)
It depends on gas out the factory. The engine is a secondary system and it’ll probably be as difficult as doing any engine swap. Since the secondary fuel is gas it’s of less primary importance.
Ethanol is cheap because it’s subsidized. And ethanol isn’t really all that environmentally friendly in the way that we do it.