2.7 eco boost is 16.6/21.5/18.5
5.3 is 13/19/15.2 This is a steel bodied truck
3.5 Eco is 15/21/17 I believe this is a steel body figure.
3.7 ford gas is 16/21/18 I believe this and 3.5 eco numbers are with steel body last years model.
Ram Eco diesel is 18.6/25.8/21.2
It seems that the 3.5 eco boost might be the sweet spot for Power vs. economy. It takes a precise amount of fuel to make HP. It may be that at 3.5 liter you start to find much smaller gain by reducing cubic inches. When both engines are in the same truck at the same weight.
