While drivers may groan every time they spend time taking their vehicle in for an oil change, there’s a good reason why regular changes are recommended and required — many good reasons, in fact. When the oil in the engine breaks down after hundreds of miles, it offers far less protection than when it was new. Poor oil quality can have a cascade of effects on the performance of your car in ways you may have never considered before. So, if you’re interested in learning what happens if you never change your oil, let’s take a look at five problems that can occur.