I have an '02 edge 3.0L with 91,700 mis. on it. I have fabricated an aftermarket intake using Spectre parts from 'the Zone.' I have also recently had to replace the camshaft synchronizer and synchro sensor. I replaced these with Rich Porter parts that come as a set. For whatever the reason may be, this has freed up some power all the way through the rpm band. I have seen milage combined highway and city as high as 24.9mpg. I generally get 22-23mpg combined. I have no specific reason as to why this may be. My theory is that these parts may just be more in synch with the grand scheme of the engines rpm band, sort of similar to certain motors back in the day were considered 'hot' motors when compared with the exact same motor. Unfortunately, computers have negated this effect in todays engines......Just my two cents....and maybe a plug nickel.