Posted on 06 April 2026
Name someone you know who enjoys spending a lot of money on gasoline. Yeah, me neither. That’s because it costs quite a bit to keep fueling your vehicle. One way to save money on gas is to get good fuel economy, and most of today’s vehicles are designed to maximize your mileage. But you might find you’re filling up more frequently than you used to and are wondering what can cause your fuel economy to tumble. Here are a few possible reasons your mileage has been headed downhill. A logical spot to start is in your fuel system. You may have a faulty fuel injector or an old fuel filter clogged with debris. Another problem might be oxygen sensors, which measure the air coming into your engine and the emissions going out. An illuminated Check Engine light may be a sign of trouble there. Plus, worn-out spark plugs can reduce your fuel economy. Under- inflated, or over-inflated, tires can also be a cause. Make sure they’re all ... read more