I can't figure out where all this concern for an Ecoboosts longevity comes from? Every day you hear someone say I don't think they'll last long yet they never say why they think that. If they do their only remark is "because it's turboed". Forced induction has been around forever in automobiles and is very reliable. I've got 11000 on my 17 EL as of now with 2000 of those miles towing a 9000# 35' toy hauler and it hasn't given me a lick of trouble. Have you seen the tests Ford has done on the Ecoboost? They've ran them constant on engine dynos for like 200k miles only stopping for oil changes then opened them up and they look brand new inside. They've ran them in trophy trucks and beat the shit out of them in Baja and haven't had any issues. Ford is so confident in them they've put them in the $500k Ford GT. They abandoned the V8 in the raptor for the Eco and it's the best selling motor in the F150. For you to think Ford would stick a motor not capable of going the distance in 90% of their entire automotive lineup is absurd. It means you truly have no faith in Ford as a brand or a manufacturer. This argument has been beat to death on this forum time and time again. The Eco out performs the 5.4 in every shape or form period. Sure the 5.4 maybe can tow 9000lbs but I promise you it won't do it nearly as efficiently as the Eco. All you have to do is look at the torque numbers between the two motors to figure that out. You won't find one single prior 5.4 owner on this forum or off it for that matter that now owns an Eco and thinks the 5.4 is better. Not one. The people that do dog on them are not Eco owners. If you have a doubt about the Eco then go buy a GM or buy a used Expedition with the 5.4 so you'll sleep better at night
And OP you're probably not gonna find a person on here with an Eco Expedition with 100-150k miles on them. After all they've only been out for two years. I don't know a lot of folks that put 50-75k miles a year on their vehicles. If they do then they certainly won't be on here chit chatting. They won't have time because they'll be out on the road driving.
There seems to be plenty of eco boost owners with over 100k miles out there and on this forum, you happen to be one of them.
As far as the dyno test you mention, running an engine on a dyno constantly for 200k miles is not representative of daily driving with starts and stops, changing climates, out on the street. A control room with HVAC and steady state run...most engines will go 200k without a problem. Add load and all the variables of real life work and use things change quickly.
Faith? No, I dont do faith when it comes to auto manufacturers. There are far too many horror stories about failures where Ford did not step up but bailed because the owner had just lapsed his warranty period. Faith in engineering is useless, facts and practical experience is more reliable. Remember the Pinto and its cousins.
Abandonment of the V8 - which by the way Ford has not, is a business strategy also influenced by politics (see DOT and EPA standards requirements).
You know what they say....if its an issue, then its an issue...re your comment "...this issue has been beat to death on this forum..." I don't find such bantor on V8s, 5.4, 5.0 or otherwise.
Lastly, re turbo engines, yes, questions are legit in gas engines vs diesels for street and daily driving use. Competitive driving is a different application all together and I can understand the advantages of forced induction there. For civilian use and daily driving? Not sure I find many turbo'd gas engines in non high performance applications where longevity and reliability are premium.
Im not averse to the eco boost, I am only seeking practical experiences in high mileage use regarding its reliability and longevity. None of the other manufacturers that I can find are using turbo v6 gassers in their truck application. If it were such a revolutionary technology, everyone would copy it.
Thank you for all the comments.