Big Block to EcoBoost

Kevin O. wrote:
...What are the #'s on the new 5.3L ??? Just curious on what they changed from the older 5.3L to now give it a tow rating over 11,000lbs like the Ecoboost?? Don't forget that the Ecoboost started out under the hood of a Lincoln and Taurus SHO before they decided to beef up the internals, add a little more boost and drop it in the F150's.... Looking at Fords sales #'s it's the best thing they ever did! I'm certainly a happy customer. :B

2014 Silverado 1500 at a glance
EcoTec3 engines: Silverado 1500 will offer three all-new EcoTec3 engines – a 4.3L V-6 SAE-certified at 285 horsepower (212 kW) and 305 lb.-ft. of torque (413 Nm), a 5.3L V-8 certified at 355 horsepower (250 kW) and 383 lb.-ft. of torque (519 Nm), and later this year, a new 6.2L V-8.

All three EcoTec3 engines feature direct fuel injection, Active Fuel Management (cylinder deactivation) and continuously variable valve timing. The engines also use a compact overhead-valve design and weight-saving components such as aluminum blocks and cylinder heads, to reduce mass, for additional energy savings

All three provide the proven power, torque and dependability of a large-displacement engine, seamlessly switching to four-cylinder mode to save fuel during light-load driving. The 5.3L V-8 has EPA–estimated fuel economy of up to 23 mpg highway (2WD models), the best of any V-8 pickup, and better than Ford EcoBoost V-6.

Silverados equipped with the 4.3L V-6 will have towing ratings up to 7,200 pounds, the highest for any base V-6 in the segment. Silverados equipped with the 5.3L V-8 and the max towing package, available later this year, will have towing ratings of up to 11,500 pounds, which is more than any light-duty pickup currently on the market.

A crew-cab with 5.3 and 3.42 will have a tow rating of 9600 lbs.

I know of an individual that has averaged over 22 mpg in a 4wd crew-cab with the 5.3 and 3.08.