I remember a few years back, I went to school with this older man. Very quiet guy, kept to himself. Anyway, we started talking one day and it turns out he's a huge car buff, and was working on some kind if invention that would have a motor run for much longer with a full tank of gas.
Anyway, I remember him telling me that there are ways to build an engine to have it use MUCH less gasoline than the standard engine does nowadays, but no car company will do so because of the profits that would be lost by oil companies etc.
He had mentioned that when he was young, he had an old chevy that was something he'd never seen before. He claimed that he could do like 1400 miles on a full tank of gas, and besides that, the car never broke down, and was extremely efficient. Anyway, eventually some guy from Chevy found out about this, and offered him a huge amount of money for the car, an amount that he absolutely couldn't refuse, and from there, he never saw it again.
Kinda makes you think. . . if this guy was legit, and what he said was true, it's just another story that makes us realize that the world is run by these huge corporations... And there's not much we can do about it.