And yet another person bashing the EcoBoost who has never driver one. Love it! This motor is a beast, it effortlessly pulls this beast of vehicle around. Torque is on demand instantly, and it has a massively flat Torque curve. Press the go fast pedal and it builds speed, with out breaking a sweat. Reminds me of my old 250 in that way. The 5.4 had less power, and worst MPG...no brainer for the 3.5Eco. The 5.0 averages the same MPG according to Fuelly, but has less Power, 5.0(360HP/380lbft) vs 3.5TT(365HP/420lbft). I used 2014 F-150 numbers, because that is the generation our Eco is. Why would you not want more power with the same MPG? As far as upgrades...the Eco can gain 80HP with JUST a tune. Can't do that on the Coyote. Love the 5.0, it sounds great, and is a great motor, but bashing the Eco, just because it has 2 less cylinders...just doesn't make sense.
Fact, it has been proven on a dyno, that the 3.5TT generates more power using 93 vs 87. Doesn't mean 87 is bad for it, but the Motor does respond to it.
I run Shell 87 most of the time. Quality gas, just 87 most of the time. 93 vs 87 does not define crap.