What is the best way to increase the fuel efficiency of a Vauxhall Vivaro van?

I have noticed that my Vauxhall Vivaro van is consuming more fuel than usual. Is there any way I can improve its fuel efficiency?

Regularly maintain your Vauxhall Vivaro van by checking its tyre pressure, changing oil and air filters and ensuring that its engine is tuned. This can significantly improve its fuel efficiency.

Avoid unnecessary idling of the van's engine and drive at a consistent speed. Sudden accelerations and decelerations can also increase fuel consumption.

Consider using a fuel additive product to improve the van's fuel efficiency. However, make sure to do thorough research and choose a reputable brand.

Good driving habits can also contribute to better fuel efficiency. Avoid carrying unnecessary weight in the van and plan your routes in advance to avoid traffic and save fuel.