Should've banned gas cars 20 years ago not for dem purposes, but for national security reasons. We should all be driving biodiesels or electric. Possibly hydrogen fueled by solar electrolysis distillation from water.
Why not just power then with unicorn farts?
Because diesels are more powerful and have been in use in Europe for decades both as hauling power and tiny commuter cars that get like 60-70mpg. The nature of the diesel engine is to run more efficiently than the gas one. Also, I've seen a demonstration of hydrogen being produced using solar power via electrolysis of simple water.
Artificial Photosynthesis Made Practical
There are others, but here's Toyota's hydrogen car:
Toyota Mirai – The Turning Point
I could even envision putting flexible solar pv cells on a car, filling its tank with water with the proper salinity for the hydrolysis and having an on-board electrolysis unit making hydrogen on demand.
Electric cars could run off charging systems using linear solar thermal array "fueling stations". No unicorns here. These are things that are solid and factual. Though I can see if you had stock in gasoline production, you might want to make them seem unachievable...