I've had both 5.0 & eco... Had a 13' F150 w/5.0 great running/riding/good power and 24mpg put 18,000+ miles in 3 months... Have a 14' F150 eco runs good, rides stiffer and 19.3 mpg I've put 16,000+ miles in 3 months... The 5.0 has better power and you just roll into the throttle and it pulls, the eco you need to run harder for the power to kick in.... The 5.0 would be my 1 st choice... The eco is by no means junk... I'd take it over a 4.6 2 valve any day...