What causes poor fuel efficiency in a Vauxhall Crossland?

I've been noticing that my Vauxhall Crossland is not getting as good of gas mileage as it used to. Is there something I should be checking or maintaining to improve fuel efficiency?

One common cause of poor fuel efficiency is a clogged air filter. It's important to regularly check and replace your air filter to allow proper air flow to the engine, resulting in better fuel efficiency.

Another factor that can contribute to poor fuel efficiency is underinflated tires. Make sure to regularly check your tire pressure and inflate them to the recommended levels to improve your car's gas mileage.

It's also important to keep up with your car's regular maintenance, such as oil changes and tune-ups. Neglecting these tasks can lead to decreased fuel efficiency and potentially larger issues down the road.