How do I increase my Vauxhall Astra's fuel efficiency?

I have been noticing that my Vauxhall Astra's fuel consumption has been increasing lately. What can I do to improve its fuel efficiency?

Have you checked your tire pressure? Under-inflated tires can decrease fuel efficiency. Make sure your tires are properly inflated.

Consider using cruise control when driving on highways. This can help maintain a consistent speed and improve fuel efficiency.

Regular maintenance such as oil changes and air filter replacements can also improve your car's fuel efficiency. Make sure to follow your car's recommended maintenance schedule.