You might be asking yourself why I’m mentioning brakes in an article about fuel efficiency. The answer is simple: Brake problems can increase the rolling resistance of your vehicle. Increased rolling resistance equates to a harder-working engine. A harder-working engine is not as efficient. Yes, we’re back to that again. It’s true, though. If you have a brake problem that’s causing the brakes to apply, or partially apply, it can make your engine work harder. In fact, I recommend you periodically check your brakes just to be sure that everything is properly lubricated and working as it should. Brakes are important — not just for stopping, but also for the overall efficiency of the vehicle. More information about brakes can be found in the Solving Brake Problems article.