With the announcement the new 2.7 EcoBoost details, looks like Ford is promoting even more weight savings... I

Weight comparison of a 2014 vs 2015 'well equipped 4x4 Lariat Supercrew'.

2014 5.0 V8 SuperCrew: 5,674 lbs
2015 2.7 V6 SuperCrew: 4,942 lbs
Weight savings: 732 lbs

732 pounds is one hell of a lot of weight to drop!

 

aluminum will do that, it's light stuff. I'm assuming the 2.7 is lighter than any engine available in the '14 lariat though, so there must be at least some difference. if they're halfway honest the '14 is a 3.5 eco...

 

Apples and oranges. What is a 2014 5.0 supercrew weight compared to a 2015 5.0 supercrew. That is what I want to know.

 

Assuming the 5.0 is about 300lbs heavier than then 2.7, the weight savings is only around 432lbs.

Very deceptive and should be on a apples to apples basis...

 

More details from PUTC:

"Ford had two F-150 Lariat models on display, one a 2014 crew cab with the 5.0-liter V-8, and the other a comparably equipped 2015 model with the 2.7-liter EcoBoost V-6. Both trucks were rolled onto electric scales, with the 2014 model weighing in at 5,674 pounds, while the new 2015 model totaled just 4,942 pounds, a difference of 732 pounds. Ford spokesman Mike Levine said that even if the 2015 had been equipped with a comparable 5.0-liter V-8, the difference would have been just 25 pounds less."


So, the 2.7L is ONLY 25lbs lighter than the 5.0 L. The CGI block and turbo plumbing must be pretty damn heavy.
You're still looking at 700lb weight loss apples to apples on the Lariat w/ 5.0

 

I agree it should be more apples/apples, but I think your estimate of the weight difference is pretty extreme.

According to the fordracing pages for the 3.5L Eco and the 5.0L, the weight of the 3.5 is 414 and the weight of the 5.0 is 444.

Obviously the 3.5 isn't the 2.7, but I can't imagine any universe where the 3.5L or 5.0L is 300lbs heavier than the 2.7. At the far extreme there might be about 100lb difference, but remember that the 2.7 uses a heavier block material IIRC and even though it is shy two cylinders, it has the weight from the turbos and piping.

Edit:
Adding the links for the engine pages if you want to check it out.

http://www.fordracingparts.com/parts...KeyField=11829

https://www.fordracingparts.com/part...KeyField=22829

 

What is the rule of thumb? I remember hearing that roughly every 200 lbs lost in weight would result in 1 mpg increase. Someone correct me if I am wrong. Obviously there are a lot of factors to effect this and could not be a general rule of thumb but could be a good rule of thumb regarding trucks in the 5-6000 lbs weight range.

 

I just pulled the trigger on the 2014 F150. I am going to upgrade in 2016 when the 10 speed transmission comes out. Thats when the ultimate fuel savings arrive.

 

Using your weight of 444 lbs for the 5.0 engine and Ford spokesman Mike Levine's statement at the Dearborn weigh-in of the two Lariats (he said the 2.7-equipped F-150 would have weighed only about 25 lbs more had it been equipped with the 5.0 engine), that puts the 2.7 engine at ~ 419 lbs. and the 2015 Lariat with a 5.0 coming in at ~ 4981 lbs. That's about 625 lbs less than my 2004 Screw 4X4 with 25 less horsepower.

 

Just wait til 2020. 20 speed transmissions. 2.19 axle ratio. 1.5L turbo 3 cylinder motors.