The all-new 2015 Ford F-150 is hitting dealerships now, and the customer response is expected to be huge. It's only the latest version of the best-selling vehicle in the US for the past 32 years. And this time it's boasting plenty of lightweight aluminum goodness to help improve fuel economy. Combined with an impressive engine lineup, the new F-150 officially has "the highest EPA-estimated fuel economy ratings of any gasoline powered full-size pickup sold in America."

That would be the F-150 with the 2.7-liter EcoBoost V6 and its 19/26 mpg city highway rating. So, should Ford's GM and Ram rivals be worried? Perhaps, but both are projecting a "bring it on" attitude. That's what we like to hear. For GM's part, its also new Chevy Colorado/GMC Canyon duo sport "comparable fuel economy with a purchase price about $10,000 lower," according to one GM spokesman. And Ram is quick to remind the world that its Ram 1500 EcoDiesel full-size truck still has the highest rated fuel economy at 28 mpg average. But diesel fuel costs more and that alone will affect some people's buying decision.

Still, the just posted F-150 EPA fuel numbers "will help keep the segment very competitive," stated the same GM official. To stay ahead of its rivals, Ford is also now developing a 10-speed automatic transmission and, at some point later this decade, a hybrid pickup.