what type of gas mileage are you guys getting on your 09 G37X? I noticed if i go by the nav screen and the computer mileage its saying anywhere from 13.5-14.5 there is no way its that low. what have you guys been getting? also what type of gas are you using and what should you use?
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using the car screen, we are getting about 10 liters/100KM which is about 23 miles / US gallon. That's my wife driving most of the time and she's easy on the gas.

When I drive, I hate to watch the gauge

 

I consistently get about 20-22 MPG with combo city/highway driving during the week, and 25-28 MPG on long highway trips. In the winter I see about a 10% reduction (I've always seen this in my cars) due to colder/denser air and winter fuel. I typically use Shell V-Power.

 

There is no way i am getting 20-22 i dont know why im getting bad bas mileage. im more in the range of 14-16 but its all town driving right now

 

You think yours is bad. My is 14mpg, some local and some highway. Had it for a month and so far not happy with it.

 

I get 21-22 over all. I average about 43-45 MPH over all.

 

I have had my X for three months (1800 miles) and have no idea of what the mileage actually is. It has been so cold here that almost every time I start it up, I let it idle for at least several minutes before driving. Too darned cold to even sit in the car - I go back into the house and watch it burn gas from there. It will be interesting to see what I can get when (or should I say if) the weather turns warmer.

 

I get around 16MPG in city stop-and-go traffic and 24-25 on highway. I find this city vs. highway difference greater on this car than on others I owned. I use Chevron Premium usually.

 

have u experienced anything problems with the car so far for having it only a month? any seat bubbling yet?

 

I drive HARD....very low mileage (2,700) Third oil change (Nissan Ester) and half
my miles have been in "snow mode". This is not from the cars computer
it's plain old math...so far 19.6 in and around the city as compared to
17.8 for same driving in my previous M35X. Just for comparison, the
car's computer is showing just over 20 overall. After next oil, fluid, and
filter change, warmer weather and return to "normal mode" I fully
expect 22MPG overall around the city. We'll see.

 

how often do u guys change the oil in the car? my dealer said that first one should be at 3700. what do u think?

 

I've been getting around 16mpg or so, but my drive to work is pretty short with lots of stop and go, plus with the weather being so cold the car idles a lot in the morning to warm it up. On a good highway trip it seems the car picks up mileage significantly - 24-25mpg. I expect the mileage will also improve once the weather gets warmer and there's more mileage on the car (only 750miles right now).

 

I have about 2300 miles on my car and been getting about 20-21 MPG with about 70/30 split between highway and local streets.
Try resetting the gauge. I know in the beginning, when I took the car from the dealership, I sat with the salesman for over an hour with the engine on but the car not moving. When I got home, I also had the engine on when I was resetting the radio and phone/navigation for over an hour. If you did the same it might help if you reset the MPG gauge.

 

I've had my G37x for only two weeks and have driven it almost solely (alas) in in-town stop-and-go traffic. The car's computer says I'm averaging 13-14 mpg. I don't think that I have a particularly heavy foot. It's cold here in Albany, NY, which presumably doesn't help. And I certainly didn't buy the car for its fuel efficiency. But still, this is disappointing.

 

Been 3 weeks since I bought the car. I have been averaging about 18 mpg (city and highway combined) in Northern VA where it's been pretty cold.