Posted on 28August2026
A drop in fuel economy does not always start with the fuel system. Sometimes the engine burns more fuel because something in the exhaust system changes airflow, sensor readings, or how efficiently the engine can move exhaust gases out of the cylinders. You may notice fewer miles from each tank before the car feels noticeably different. Other times, reduced MPG shows up with sluggish acceleration, unusual exhaust noise, or a check engine light. The key is to determine whether the exhaust problem ... read more