Keeping up with your oil changes is important to the overall wellbeing of the vehicle. Oil changes extend your engines life by tens of thousands of miles. Friction causes the parts to wear down, but this can be prevented by quality oil in the engine.
New, clean oil keeps the engine well lubricated. The engine performs better, which in turn leads to less gas at the pump. Oil changes are a preemptive way to keep your car on the road and out of the shop.