What is the most efficient fuel type for a Ford Focus?

I'm looking to purchase a Ford Focus and I'm wondering which fuel type would be the best choice for this car. I want to make sure I'm getting the most fuel-efficient option available.

As an avid Ford Focus owner, I highly recommend going with the EcoBoost gasoline engine. It may have a slightly higher upfront cost, but the fuel efficiency and performance make it well worth it.

I've found that with the rise in gas prices, diesel is the way to go. The Ford Focus diesel option has excellent fuel efficiency and torque, making it a great choice for both city and highway driving.