When you first start driving, everything is new. Even the simplest of actions takes effort. But unless you’re a car fanatic, or among the cast of Cars 3 – the new characters, driving becomes pretty rote pretty quickly. You likely don’t think very much about how cars work except that you need the keys to make it start. Somewhere in your mind you know there’s a lot going on when you first turn the keys, but that doesn’t mean you understand the full mechanics behind it. Here’s a quick guide to understanding how a car works (specifically, how your car’s engine works.)