I just found this on pickuptrucks.com. Looks like a sweet deal if anyone lives around Laughlin, Nevada. Click on the link for the story. They're offering to pay gas, food, lodging, etc. for 5.0 and EcoBoost owners who are willing to test their trucks for the site to determine actual fuel mileage results for both engines.

We Need Your Help: 2011 Ford F-150 Towing Mileage Challenge - PickupTrucks.com News

 

well, if i lived closer and had a screw instead of the supercab i'd be all over this offer but, unfortunately no luck...

 

I read about that, that's pretty cool.

Personally I'm guessing the 5.0L will win the ''towing'' fuel econmy shootout. Seeing as the 4X4 5.0L with a 3.73 rear end they tested back in Feburary posted almost 3mpg better towing a trailer equal to the weight of the trailer the 2WD 3.55 rear end Ecoboost pulled for their latest road test.

But we shall see what happens.

 

Takes lots of power to make boost...which is then used to make more power. Not the most efficient 365 HP out there. I think the EB will really shine when unloaded and cruising the highway at low boost.

I'm sure it'd be a better towing platform from the driver's seat with the extra torque, but that comes at a price.