^^^
Our '01 3.0 is a 5 speed, and doesn't have that better 6th ratio, but fwiw my OBC shows 20.3 cumulative, which has only been reset a couple times in 13+ yrs and 99 thou + miles.
On tank fills using arith, we usually see 20/20.1/20.4 etc, with a rare 21+, on trips during non-summer/no AC, all day drives.
In the usual of around town/some highway, and up & down our very steep mtn road, aka 'general driving', we see 17-18.
MPG was never a real consideration, but it has remained quite constant over all these years. Occasional Premium, lots of mid grade, rarely Regular, though that infrequent 21+ has come using mid grade on all day 700+ mile haul azz road trips.
MPG is no big deal for us...fwiw, our '02 VetteVert does 25 all the time and often 29-30 on trips. Different gearing, (5th is OD/6th is Way OD), weight, frontal area, coefficient of drag, etc.
My 3 m'cycles all get 40 to 45,
, and the CEO's Hyundai Tucson only does 24, at best. I care about mpg, but I don't care, if that translates.
GL, mD