What is the best way to maintain the fuel efficiency of a Vauxhall Astra?

I recently bought a Vauxhall Astra and I want to make sure that it stays fuel efficient for as long as possible. What steps can I take to maintain its fuel efficiency?

Regularly check and replace your air filter to ensure that your engine is receiving enough air.

Don't neglect your tire pressure. Underinflated or overinflated tires can greatly affect your fuel efficiency.

Make sure to use the recommended fuel grade for your Vauxhall Astra, as using a lower grade can decrease fuel efficiency.

Avoid idling for long periods of time, as this uses unnecessary fuel.