What is the best way to increase the fuel efficiency of a Ford Transit Custom?

I recently purchased a Ford Transit Custom and I am looking for ways to maximize its fuel efficiency. Are there any specific techniques or modifications that I can make to my vehicle to improve its fuel efficiency?

One of the best ways to increase fuel efficiency is to keep your vehicle well-maintained. Regularly check and replace air filters, spark plugs, and fuel filters to ensure your engine is running at its best.

Keeping your tires properly inflated can also have a significant impact on fuel efficiency. Underinflated tires can decrease gas mileage by up to 0.3% for every 1 psi drop in pressure.