I like to open up the throttle all the way and shift at 5k which greatly diminishes the mpgs but I literraly drove for a week shifting at or below 3k and there really was no difference so I just stick to the 5k all the time...LOL

 

i get average 14 mpg =\ i shift under 3000

 

I get better mileage in my 4 door, 5.7 liter CTS-V.

 

same here,

 

I get 16mpg on everyday driving city and highway. I tried driving slow for a week or so, but not much difference. So i just started driving normal again, saving 1mpg doesnt equal the amount of fun of driving the G however I want. I had test pipes (cat-delete) installed on the car before and the milage drop to like 14mpg, right now the only mod I have is the Injen CAI. Hopefully I will be getting the Injen SES in a couple of months and putting the test pipes back on, I'll let you guys know how the MPG do. Anyways I think they will go back down to the 14s.

=( unfortunately the G's are not the best in Gas, hey but they make up on much other things

 

I have a 04 6mt coupe and I'm getting between 19 and 20 mpg with a mix of city/highway driving.

 

I get between 18-19 in the city and 25+ on the highway and I definitly dont baby it (except during winter)

 

I'm getting somewhere around 260 for the tank. And I though my Maxima had bad gas milage . But the Max doesn't drive like the G!

 

had my g for less than a week. already filled it up once... got about 22.5 mpg... i'm babying it right now for the break in period. but you guys are scaring me withe mpg numbers... how's a 3.5L V6 engine getting slightly better mpg as my 6.0L V8????

 

They also have 2 overdrive gears LOL.. Like 1800 RPMs at 70 or some crazy crap.

My car IDLES higher than that..

 

I have an '05 5AT with about 11,000 miles. I routinely get 21-22 mpg if I do a lot of urban driving and 26-27 mpg if all highway (cruise set on 78). I've gotten as high as 28, but the lowest ever was 19.5 mpg and that was the first fill up when brand new. Unless you guys are jumping on it all the time, I can't understand the discrepancies.

 

I get about 20 city, 22 City/Highway and bout 26-27 highway with cruise on 75

 

Just got 350 miles on 16.5 gallons, mostly city driving. I always shift in the 5k range as well. I think my ECU is finally adjusting from the Ztube and filter mod.

 

That's a pretty good breakdown of my estimates too. I can put about 350 miles per 17 gallons on a road trip, but I average about 320 miles per 17 gallons of freeway driving/stop and go during the week commuting to work.

 

21-22 in mixed driving.. 25 on straight hiway