How can I improve my Vauxhall Vivaro's fuel efficiency?

I've noticed that my Vauxhall Vivaro's fuel consumption has been higher than I'd like. Are there any modifications I can make or maintenance tips I should follow to improve its fuel efficiency?

First, make sure you are following the recommended maintenance schedule for your vehicle. Regular oil changes, tire rotations, and other maintenance tasks can improve your fuel efficiency.

Consider switching to a high-quality synthetic oil to reduce engine friction, which can improve fuel efficiency. Also, check and replace air filters regularly to improve air flow to the engine.

If you're comfortable with basic car maintenance, you can also try cleaning and tuning your fuel injectors and spark plugs. This can improve fuel efficiency by ensuring your engine is running at optimal levels.

Lastly, make sure you're not overloading your Vauxhall Vivaro. Transporting heavy loads or towing can significantly decrease fuel efficiency. Consider using a trailer for large loads instead.