just bought my car on saturday drove it from san diego 100 miles home and i just filled up yesterday having a 1/4 tank left i avaraged 19 driving about 70-80 fwy im def gonna ease up on the gas to try to bump up that rpg but maybe after another week...

 

^ (Louisiana G35) i think your the only guy on here that is getting 28-32 mpg. It seems like your babying your car. I know for me i drive my car pretty hard. I bought this car to have fun and to feel the power. i am not really worried about the MPG. if i was worried about it, i would have bought a Yaris.

and WTH is seamed! really?!?

 

I cant get 28-32 mpg when I granny my G, driving a steady 60mph on the freeway. It just can't happen. The best mpg I have ever attained (& I purchase the car new) was 26 mpg and it wasn't for very long, nor was it the slightest bit of fun.
I've had some chats with guys that get 32 Imp mpg. That I can see.
For the record, my tires are properly inflated to 33 psi (cold), the engine air filters are clean, the oil and filter is changed ever 6k km, and I always use a premium octane fuel (91 or better).

EPA tests have the G35 rated at ~24mpg hwy and, with the exception of variable external and engine temperatures, they practically test drive in a vacuum. (0% grade, no wind etc etc.)

 

Like i said before. I pray that i get 20mpg. I am mostly city driving. But since i went to SD last weekend i got my 18 to 21.1. Now this morning it went back down to 20.9.

 

Do X's get less mpg? Never have done the research on how the AWD system works on them..but perhaps a worthwhile question to ask here?

I'll chime in on this post again...I've been really trying to see what I can do over the last month for mpg improvement without driving like a complete granny, but pretty stinkin’ nice. I’ve been getting in the 24-25mpg range in what I’ll call a 70/30 mix. When I bought my car with 30k on it and drove it hard I wasn’t paying as close attention, but it was 20/21 I think.

And I’m happy very with my new mileage that I’ve been getting.

Last summer I replaced my 300whp GTI 337 that was killing me on maintenance, time, and beginning to rust out. But, that car got 27-29 mpg on my average's weeks commute so I wanted to get something semi-close to that... So with eyes wide open I knew I wasn't getting a prius, or an Accord, or a Civic. But I was buying a car that wouldn't break every other week, wouldn't nickel & dime me to death, and wouldn't absolutely kill me on MPG. So far in owning it almost a year, its been perfect.

As I'm learning this cars personality small things all add up:
Fluids
Air Filter
All city? Not gonna get mid 20s, sorry.
Stopping / starting - ie., rush hour traffic on hwy
Actual speed matters most! Go over 68 and it goes down fast fellas.
Tire pressure
Wheel weight (18", lighter than 20"s...) Matters with city traffic a lot…
Coasting to a stop, general driver awareness.

Over this last month of time of trying to change my driving habits, the best mpg I got was just under 27 mpg over 375 miles, in a 90/10 split, a few longer trips on the highway where I didn’t go over 70, and drove really nice..

I’ll take both my highway mpg, and in my real mpg over an averages weeks worth of driving. You might be able to do better with say, a TSX, that’s a 4-cylinder, that gets 30-33mpg highway, but for what? At $4.00/gallon over 16000 miles/ year might save you ~$500 bucks a year? That $500, and matters, but its not worth changing cars over…Just slow down and its like putting money in your pocket if that worries ya. It did me, I tried this experiment because I drive a lot and fuel was starting to make a bigger pocket book dent than I wanted it to….

Finally, I calculate my mileage based off of my trip’s mileage and how much fuel I put in. My gauge seems close, but when I calc’d out 26+mpg, the gauge looked like it was at 24, or below that 25mpg line. I can’t imagine getting anything more than 27mpg on a level grade, on pure highway, not with my 5AT with current gearing. Sorry it this post was so long~

 

OK, which "gauge" are you referring to? I think this comes up a lot; some people are referencing the "Trip Computer" display (located between the speedo and tach, and others are referencing the larger center console info display (where NAV is/would be). I believe the Trip Computer mpg (which reads digital, so there is no guessing about what it's showing) is very accurate and is easily reset at each fill up. Whereas for some reason, the center console info seems to vary widely for people depending on ... what???

 

Here is just one good place to look for some real world results.
http://www.fuelly.com/car/infiniti/g35

 

It was the one on the nav / center console where I was talking about.
Cool link...thx

 

Just did the second test which is similar to the first test that I posted last week. This time, I cruised at 2400rpm (58-59mph). Here is the results:

- Test 1: dry road vs. wet in previous test. It comes out to be 28.4mpg

- Test 2: pretty much same condition except going against the wind. I got 27.4mpg

So the final number is 27.9mpg at 2400rpm vs. 28.7mpg at 2600rpm.
I will do one more test at 2800rpm just to figure out at what rpm our cars will yield best gas mileage.

 

Xs get about 1-2 MPGs worse than non Xs

 

Xs are heavier and loss more power due to the AWD power train. Thus, Xs get less gas mileage than RWD.

 

AWDs only weight roughly 100-300 lbs more than a non AWD

 

Every pound counts. It would be very successful if people can drop 100lbs on their cars by doing all the weight loss tricks. You can feel the difference in acceleration with 1 and 2 people in the car.