How can I improve the fuel efficiency on my Vauxhall Vivaro?

I've noticed that my Vauxhall Vivaro is not getting the advertised fuel efficiency. What could be causing this? Is there anything I can do to improve it?

One common reason for decreased fuel efficiency is low tire pressure. Make sure to regularly check and inflate your tires to the recommended pressure.

Another issue could be a clogged air filter. Consider replacing it to improve air flow and fuel efficiency.

You could also try using a fuel additive to clean your engine and improve fuel efficiency.

In addition to vehicle maintenance, changing your driving habits can also improve fuel efficiency. Avoid aggressive acceleration and try to maintain a consistent speed.

Something as simple as removing unnecessary weight from your vehicle can also make a difference in fuel efficiency.