How to increase the fuel efficiency of my Ford Transit Custom?

I have been using my Ford Transit Custom for work and I have noticed that it consumes a lot of fuel. How can I improve its fuel efficiency without compromising its performance?

One way to improve the fuel efficiency of your Ford Transit Custom is to regularly check and change the air filter. A clogged air filter can decrease your fuel efficiency by up to 10%.

Maintaining proper tire pressure can also help improve your fuel efficiency. Make sure to check your tire pressure regularly and keep it at the recommended level.

You can also consider installing a fuel economy chip or module to your Ford Transit Custom. This can help optimize your engine's performance and improve fuel efficiency.