I to was scared of the ecoboost but mine hasn’t had any issues in 12k miles. The fuel economy is subpar when under load and I tow fairly often. But right now I’m visiting some family and decided to fly and then rented a 2019 Tahoe. I can tell you that the 5.3 is slow compared to the ecoboost and I miss the power. Even running 87 octane in our heavier Expedition Max, it will flat out leave the Tahoe in the dust. The Tahoe has just over 6k miles and my first fuel up after 300 miles driving was 15.8mpg in the Tahoe which consisted of 60% at 68-70mpg on cruise on flat highway, 35% sprinted city driving and 5% town/country roads. Driving the same way, speed and roads in our Expedition probably would have set me close in mpg but the Tahoe would be slightly better, keep in mind the Tahoe is running P265/65r18 Michelin Energy Saver tires and I run LT275/65r18 Goodyear Duratracs on my Expedition. Everything else is just so much bettering the Expedition. More cup holders, more interior storage space, more passenger room, individual second row seats(at least in my limited), not the 60/40 split like the Tahoe, make accessing third row easier with stuff(car seats and kids toys, garbage cans etc.) in the second row. The ride is better in the Expedition too. I could go on and on about how much better my Expedition is or I could tell you to go sit in and drive all of the choices and pick the one you like best