How to maintain the fuel efficiency of the Vauxhall Vivaro?

I own a Vauxhall Vivaro and I'm looking for some tips on how to maintain its fuel efficiency. Which parts should I regularly check and how often should I have them serviced?

Regularly check and replace air filters to ensure proper air flow and avoid overworking the engine.

Make sure your tires are properly inflated to reduce fuel consumption.

Get your fuel injectors cleaned regularly to improve engine performance.

Avoid excessive idling and unnecessary trips to save fuel.

Always use the recommended grade of oil for your Vauxhall Vivaro to improve engine efficiency.