How to increase the fuel efficiency of a Vauxhall Vivaro?

I have recently purchased a Vauxhall Vivaro and I've noticed that it's not very fuel efficient. Are there any steps I can take to improve its fuel efficiency?

Making sure your tires are properly inflated can help improve fuel efficiency. Also, avoid aggressive driving and stick to the speed limit to save fuel.

Regular maintenance, such as replacing dirty air filters and properly tuning the engine, can significantly improve fuel efficiency.

Consider using a fuel additive that is specifically designed for improving fuel efficiency. They can help reduce friction and improve engine performance.