How do I increase my Vauxhall Combo Life's fuel efficiency?

I've noticed that my Vauxhall Combo Life isn't as fuel efficient as it used to be. What steps can I take to improve its fuel efficiency?

Regularly check your tire pressure and make sure they are inflated to the recommended level. Low tire pressure can increase fuel consumption.

Avoid unnecessary idling and use the cruise control feature on long trips to maintain a consistent speed. This can help improve fuel efficiency.

Consider using a fuel additive that can clean your engine and improve its performance. This can also help increase fuel efficiency.