While its not quite in the same league, I just bought a Toyota Prius-C....
Obviously I still need to use petrol, however consumption is massively low compared to most cars.
I'm averaging anywhere between 3.6 - 4.0 L/100km - which is unheard of.
I decided since I was going to start Uber-driving full time I was going to need something economical and would minimise my emissions.
I'd love an electric car, and is definitely on my wish list. But not for driving Uber - although I'm sure the tech will improve eventually.
Good to know, thanks - I will look into hybrids too as I go on with this, though am definitely wanting a pure electric instead. Who knows where the tech will be in a couple of years, it could be way further than most imagine!