Have to relay what I've found thus far with my car. Just bought it used with 33k on it.

2007 G35S, RWD, Auto, entirely stock, with amsoil, a new air filters, 37 psi in my tires, and taking it easy on the throttle..... I get 24.5-25mpg in my daily commute. 30 miles one way, with 80% highway, and a few stoplights, so I'd say 80/20 mix. Not driving agressively, not redlining it, I can get that kind of mileage. Mileage indicator average goes up in the morning because of less stops, and goes down in the evening when I'm stuck on the highway in traffic.

Since I'm new to the car I needed to learn how far it was off my previous car, a 300hp GTI..., that was a fuel efficient car. 26-28mpg with all that power. The G35 is a great car, but really, if driven without a lead foot can show not terrible results.

As a comparison btw, my brother in law has a 08' Maxima, with the CVT...He doesn't drive crazy, and he gets 22-23mpg as well in a 70/30% mix. And you can get 30mpg with midsize/full size cars but they are a whole lot less fun to drive. Name your example, Camry? Not interested. Impala? Not interested. Taurus? Not interested. hyundai sonata? Not interested.

(I rented a 2010 Sonata & drove out to Montana from Minneapolis this summer and got 34 mpg going 80 btw people!) Not a fun car, but practical.

Everyone here is spending several hundred dollars more a year on gas to drive a G35. BUT since I just went through this; compare this car to a 2009 or newer Audi A4. Very nice interior, fast enough if you chip it, but still not in a G35 league. But the kicker is maintainance / reliability. I wanted a car I didn't have to worry about. BMW/Audi and others in our class won't be as reliable (Acura I guess would be). So if "average" mileage is the price I pay for all these other positives, so be it.

Just thought I'd share this because I agonized over this purchase all summer.

 

Reliability is one of the reasons I bought the G over the Germans - did not want to go to the dealership for this light or that sensor going bad. I am with it for the longer haul, and the few hassles that it gave me are really appreciated. Considered getting the TL but the previous gen did not have AWD and the current one is so butt-ugly that it was never in contention.

 

Before I had this car, a 2007 G35x, I had a Acura TL. In the Acura I was getting around 20MPG with my medium traffic driving. In this G35x I am getting about the same gas mileage as in the TL. The only difference that I notices is on the long trips. In the TL I was getting 26-27mpg, but in the G35x I'm getting 23-24mpg.

By the way, just like many of you have said, I looked at a lot of cars in this price range. I gave up on Audis very quickly because of reliability and the price of parts, outrageous. I looked into Acuras again, but I wanted rear or awd, so that was out really quick. Then there was Lexus IS, GS and LS, my wife found the IS too small, hated the look of the GS cars, and concluded that the LS is too much of a grandpa car. Next was MB, I considered only some late model C and S class cars, I never liked the look of the E class. I could not find an S class in my price range and again the wife thought that the C class was too small. OK, I'm getting a bit out of hand. At the end I was left looking at a 2002 BMW 330it, 2001 BMW 740i, 2006 M35x and 2007 G35x. From these choices I chose the G because of the options it had and its performance. Sometimes I still think that I should of picked the M, but then I just step at the gas and remind myself why I picked the G.

My G has 107xxx miles on it and it purrs like brand new.

 

YESS!! Great to hear this because I am at 75xxx miles and was getting worried more and more as I got closer to that 100xxx number.

 

Average 16.4 mpg in mainly suburban driving

 

Forgot to mention... I get 19-20mpg on 30Hwy/70City split.

 

It's all good. I got average 8mpg in the G.

 

I wholeheartedly believe that it has more to do with the driver than the car. My wife has an 06 Murano, same engine, just tuned differently. When she drives it she gets between 15-16mpg. On the same route that she drives, I get 18-19mpg. It just goes to show you that different gray matter will get different results in the same environment.

 

do you wants stupider than low gas milage, for us lead foot, me.

The freakin gas tank is only 16ish gallons. That is what stinks, i don't care how much gas I use, just that I hate going to the station...

 

i get about 300-320 miles a tank driving 80% highway and 20% city everyday.

 

Got an 07 Journey 5AT and I usually get 20mpg overall. I do 2/3 highway and 1/3 city. City is a struggle to keep it up there as I usually get like 16 or 17 mpg while babying the throttle with use of neutral to coast. Highway is only like 23 if I go 65-70, if I start gunning it in the left lane at 85 it will be back down to 20. I don't know where they got 25 from for highway, that's impossible imo.

 

^^ I'm with you man my 07 X never gets above 22-23 on the highway even driving like my grandmother is in the car with me!

 

I picked up my 08' X in late December and have been avg just under 17mpg. I'm thinking the new car factor is killing my mpg plus the sub 0 temperatures aren't helping either. I'd say my normal drive is 80% hwy and 20% cty.

 

I'm at 19-21 mpg regardless of trying to conserve or getting on it. Always over 300 miles per tank. ~350 if I recall.

 

Currently at 13.8mpg with an 08X and mostly 90% city drivin in this cold upstate NY winter...but then again having a Stillen exhaust doesn't help with mpg because i cant get over the sound or doing donuts in the snow