well.....I doubt that ...
cheap oil, is the result of a lot of hard work and a lot of science in getting oil that before was out of our reach to now be able to be pumped out of the ground.
But the result is that the need to find other ways to power our cars has dropped away.
While you still see some talk about solar cars, or hybreads, the truth is that with gas at the pump as cheap as it is, there is simply no real reason to worry about building a sun-powered car right now...