How to increase fuel efficiency in a Ford Transit Custom?

I recently bought a Ford Transit Custom and I noticed it's not as fuel efficient as I expected. Are there any ways to improve its fuel efficiency?

One way to increase fuel efficiency is to regularly maintain your vehicle, especially by checking and replacing air filters, spark plugs, and tires. Also, try to avoid idling for long periods of time and use cruise control when possible.

Another factor that affects fuel efficiency is your driving habits. Aggressive driving, such as speeding and frequent braking, can lower your fuel efficiency. Try to drive at a constant speed and anticipate braking to improve your gas mileage.

In addition, consider the weight of your cargo and how it may be impacting your fuel efficiency. The heavier your vehicle, the more fuel it will consume. Try to remove unnecessary items or distribute the weight evenly in your van.