rruff
Explorer
I'd give the 3.3 the nod for both MPG and reliability. According to Fuelly, the 3.3 averages ~19.5 vs 18.5 for the 2.7... but data on the 2021+ 3.3 models with the 10 spd are lacking; really not a lot of data on the 3.3 period.wow I didn't know this.
If you had to pick a new F150 for long-term ownership, longevity, cheap service, decent mpg and you also knew you were not gonna tow anything more than 8000lb what engine would pick, the 2.7EB or the 3.3NA?
It seems to really bother people when their "weak" engine has to downshift and rev to go up hills, but it doesn't hurt anything, and 3.3 should be fine towing. The 2.7 is definitely stronger and will tow more effortlessly. It will be even stronger (relatively) at high altitude. Something else in it's favor is the ability to get a heavy payload option... don't know about other options, be sure to check what's available. I'd guess the 3.3 is only available on lower trims. The 3.3 is so unpopular you may be able to get a deal if you find what you want on the lot.