Ford Fusion 2018 lower gas mileage issue with only 31-32 mpg despite fuel injector cleaner use on Ford Fusion

Some Ford Fusion 2018 owners report experiencing lower gas mileage despite using fuel injector cleaner, which may be attributed to several factors. These owners have noted that a misfiring engine can significantly decrease fuel efficiency, often indicated by the check engine light illuminating. Additionally, underinflated tires have been reported to negatively impact fuel economy by increasing rolling resistance, forcing the engine to work harder and consume more fuel. Furthermore, some owners have found that a worn battery can contribute to poor gas mileage, as it may hinder the electric motor output and overall vehicle performance. Addressing these issues is crucial for improving the fuel efficiency of the Ford Fusion 2018 model.