What is causing poor fuel economy in my Vauxhall Vivaro?

I've noticed that my Vauxhall Vivaro is not getting the same fuel efficiency as it used to. What could be causing this and how can I improve it?

One of the most common reasons for poor fuel economy is dirty fuel injectors. Have you had them cleaned recently? If not, consider getting them cleaned.

Another possible cause for poor fuel economy is a clogged air filter. Make sure to replace your air filter regularly to improve fuel efficiency.

Your driving habits may also be contributing to poor fuel economy. Avoid aggressive driving and try to maintain a steady speed to save on fuel.