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

I am considering purchasing a Ford Transit Custom and want to make sure I get the best gas mileage possible. What is the most fuel efficient engine option available for this model?

The 2.0L EcoBlue diesel engine is the most fuel efficient option for the Ford Transit Custom. It offers up to 42 mpg on the highway.

I highly recommend investing in the 1.0L EcoBoost gas engine. It may not have the highest fuel efficiency, but it offers a good balance of power and efficiency.

In my personal experience, the 2.2L diesel engine has been the most reliable for long-term use. It may not have the best gas mileage, but it is a durable engine.