How to maintain the fuel efficiency of my Vauxhall Movano?

I have noticed that the fuel efficiency of my Vauxhall Movano has decreased recently. I want to know the best practices to maintain its fuel efficiency and save costs in the long run.

Regularly check the tire pressure to ensure they are properly inflated. Under inflated tires can decrease fuel efficiency by up to 3%.

Avoid idling for long periods of time. Turn off the engine if you will be stationary for more than a minute. This not only saves fuel but also reduces emissions.

Service your vehicle regularly as per the manufacturer's recommendations. An engine tune-up can improve fuel efficiency by up to 4%.