Get a GMC with the 5.3 V8. It gets better overall gas mileage than the Ford V6 Eco Boost.
But, with that being said no pickup even the over hyped, underpowered V6 Eco Boost, gets good gas mileage in town which is probably why so many people who own one are screaming about the terrible gas mileage.
Gas mileage and pickup truck is pretty much an oxymoron besides, Consumers Reports has dropped the F150 with the 3.5Litre Eco Boost truck to a not recommended vehicle.
Consumer Reports December 2013 edition.