I do mostly city driving and the average is about 17.4 mpg.

on long trips on the highway i have gotten up to 26 mpg

 

I'm a new G37 Coupe owner (Journey model). It's a 2008, with a 5 spd auto. I've had it for about a month now, and I've been checking the mileage pretty carefully as I've filled up. I do about 50-50 highway and stop/go driving, and I've been getting between 20 and 21 MPG, which I think is pretty good, considering the car. I'm a fairly conservative driver, but I get on it once in a while. I'm planning on an extended driving trip of several hundred miles on the interstate next week, I'll report on what mileage I get when I get back.
cheers,
LanceB

 

2008 G37 Auto 65K miles

19 mpg - city (used to get 20-21 for the first 60K miles)
22-23mpg mix of city/highway

 

08 sport 6 spd: average is 18-20.

i spend too much to fill up often.

 

had my car for about 4 months, been at 19mpg the whole time

 

Whats the break down driving wise?

 

Round trip West Covina, CA to Las Vegas, NV. 501 miles @27.95mpg. All freeway at 70+mph.

 

Here's the follow-up to my earlier post. I took a driving trip last week from Los Angeles to the Bay area and back, 740 miles total. Took the I5 north, traffic was remarkably heavy. Drove 70 as much as I could, but was often lower due to traffic conditions. Got 26+ mpg. Took the coast route back. Slower with lots of twists and turns (very nice, scenic drive). Got 30+ mpg on the return trip. Not sure why the difference, but I think it is mainly speed based. I think if you have the patience to keep the speed at 60, you'll get 30 or better mpg. Personally, I don't, and will accept the 28 mpg trip average as being pretty good, considering the car. (Really opened it up for the first time during a passing maneuver and went from 50 to 100 in about 3 seconds. Felt pretty good!)

 

2011 xS coupe - driving relatively sane, the best I have gotten on the road was 25.2. It is usually between 23.8 to 24.5.

City driving goes between 13.8 to 15.2.
<O
I expressed concern to the dealer on the MPG, and they said the car takes a while to break in. I am presently at 9800 miles.
<O
I had a sedan loaner with 2700 miles on it over the Christmas holiday which I took two road trips in.
<O
The first trip I got 29.2 and the second 28.5, driving my same style. I know the sedan gets a little better mileage, but this was more than a little better. <O

 

I believe the all-wheel-drive model (the "x" model) normally gets lower gas mileage.
This stands to reason, considering the additional parasitic horsepower loss when driving all four wheels. Perhaps other "x" model owners can relate their experiences.

 

20 miles average per gallon

 

I just got an '08 G37 5 speed auto with 24,000 miles and love it. I'm getting about 21 MPG on the first two tanks I've driven. I'm not babying it by any means. I hope I can get mid to upper 20's on the highway.

 

2008 g stock everything, Los angeles to Carlsbad new Mexico 980 miles, 75-80 mph I'm getting 25.5 so far. I'm going to Baltimore to finish the coast to coast move in a couple days.

 

G37x

Hit 24.1 per the car computer on a 700 mile roadtrip, but mostly in the 23's.

 

2010 G37S. I get 19 in city, which is mostly my 10 minute drive to work. Not much highway driving, but I got a little more than 25 on my last road trip.