How can I improve fuel efficiency on my Vauxhall Astra?

I have recently purchased a Vauxhall Astra and I am looking for ways to improve its fuel efficiency. Any tips or suggestions would be greatly appreciated.

Regularly servicing your car and keeping up with oil changes can significantly improve fuel efficiency. Also, try to avoid accelerating and braking too quickly and maintaining a steady speed on the highway.

Check your tire pressure regularly. Underinflated tires can decrease fuel efficiency and also wear out faster.

Using cruise control on the highway can also help improve fuel efficiency as it maintains a steady speed and avoids unnecessary acceleration.

Consider using a fuel additive or using premium fuel. These options can sometimes help to increase fuel efficiency.