Before I supercharged mine, I was able to get around 430-440 on the highway going 70mph.

After the supercharger I took mine on the road and got 410 out of it.

It is doable.

 

I am amazed.

 

i think you have to drive hwy/fwy to hit 400. if you live in the bay area, it's impossible.

 

2004 6mt...i'm consistently getting 20-21mpg with mixed city and highway driving.

 

2003AT Coupe - 330 on a full tank mostly highway.

 

I've had my 06 6mt coupe for about 2 months now, and here's my MPG break down for each tank I put in:

16.6
16.8
20.8 (long distance Austin->Houston->Austin)
15.5

I mostly drive in traffic, ~20 miles to and from work everyday. Not bumper-to-bumper, but definitely less than 55mph.

 

18 city
22 freeway

and it still feels like I am filling up half a tank every 4 day, I hate it!!!

 

18 city
23 highway

Max range: around 360 mi on around 18 gal

 

I've been averaging about 22-23MPG throughout the time I've owned my car.

Worst: 19.XX MPG
Best: 23.XX MPG

But on avg. based on my observation: 22MPG

Oh, I also drive about 80% freeway, 20% city


05 G35 Coupe 6MT with the Aero package (if it does anything )

 

18 mpg city and 25 mpg highway

 

Mixed city/hwy 18-23 mpg with a heavy foot too.
When I do the Nor Cal to So Cali - SF Valley run, 75-90 mph, approx 385 miles, I still have about an 1/8 tank left. Can't complain.

 

mostly traffic i get about 300 @ 16.5 gallons (my E light turns on REALLY early) @ about 18.9 mpg

when i take long drives it's about 360 @ ~22-24 mpg.. not so good

 

2006 G35 M6 Coupe...85% City....Average over the past year has been 18.89 MPG.

-GT

 

same here.. with an 03 6mt

 

Best I've ever done is about 410 on a tank. Worst about 350. But I do about 70% HWY. The winter reformulated (ethanol) gas has the biggest impact since it has less heat energy to push the pistons down. Expect 1-2 MPG less with that stuff.