What is the most fuel-efficient option for a Ford Transit Custom?

I am looking to purchase a Ford Transit Custom and have heard that certain engine options offer better fuel efficiency. Which engine option would you recommend for optimal fuel economy?

I highly recommend the 2.0L EcoBlue diesel engine for maximum fuel efficiency. Not only does it offer excellent fuel economy, but it also has impressive power and performance.

I have the 2.2L Duratorq diesel engine and have been extremely satisfied with its fuel efficiency. It may not be as fuel-efficient as the 2.0L EcoBlue, but it still offers great mileage and is a reliable choice.

If you want to prioritize fuel efficiency, I would go for the 1.0L EcoBoost petrol engine. It may have a smaller engine size, but it offers excellent mileage and is a great option for city driving.