It's just energy, but oil happens to be a very useful form of energy. It is high-density, which means a little of it goes a long way. It is relatively stable and safe. There is nothing wrong with using more of it. We need to use more energy as a society, a lot more energy, because the more we use, the higher our standard of living. This is a one-to-one relationship. More energy use equals a better life. We aren't going to run out of oil. There is lots of it in the ground.