I've seen a couple of posts on the US forums discussing gas mileage but I thought I would ask the question here so as not to have to convert to smaller gallons and miles per gallon. I have not yet turned over 1000K on my G35c, driving it easy during the break-in and I've just put another $60 of gas in the tank. That is my third fill up since new. My last car was a 540i with the 4.4 V8 and a Dinan Chip set. I swear the fuel gauge on that car moved as fast as the minute hand on my watch. It was very thirsty. I was hoping the G35 would keep my visits to the Premium pump a little less frequent. I know the mileage "should" improve once the car has broken in but, what should I expect, and when.

Thanks,

 

Post your actual mileage and we'll tell you if that makes sense. I get about 21-23 combined and about 30 on the highway running about 115 on my 6mt. Generally I run my very easy and in the highest possible gear most of the time.

 

I"m at about 13mpg on my '05 with 1700kms.

 

That's in the winter too which mine hasn't seen so I can't compare.

Yours will improve with break in.

 

I think Hedly seemed to ask for it in km/L but anyways, I've averaged 8 km/L or 19 mpg over 18000 kms, mostly city driving, 5AT. It fluctuates between 14-21 mpg depending on how hard you drive...

Mileage didn't improve for me after break-in because I no longer drove it easy!

 

I have driven about 600km since picking up my car almost 3 wks ago. So far, I avg 14L/100Km, mixture of hwy and city driving. I certainly hope mileage improve eventually.

 

I have recorded every fill-up since new. I now have almost 7,000 km on my 05 G35X.
My driving is about 70% highway, and I run from 11.4 L/100km to 12 L/100km.
The calculations are from actual fill-ups not digital averages from the car. I have yet to calculate mileage on a straight highway run.
Wayne

 

I'm a dinosaur that hasn't converted to metric for gas yet.
I work that out to 23.5 to 24.7 m/gal. for you Wayne. That's in the range of mine for similiar driving and similiar kms.(I've got 7500) My one straight highway run was 9.4l/100k but I never really drove below 115 and sometimes was a bit more than that. With 90-100k driving I'm sure it would be around 8.6-8.7. I'm hoping the change to synthetic will yield some small improvements too.

 

I hope so! With some analysts expecting crude to go up to 100USD/barrel, I might have to trade in for a TDI!

 

I'll rmind you about the TDI in another 3 months when the sun is out the temps are warm and the G is all shined up.
I think those analysts have a little too much moonshine in their coffee. Most analysts believe low 40's makes sense. I won't complain on the investment side though if the other guys are right.

 

Hi Deane, I really don't think that is too bad considering it is not straight highway miles. I always use 91 octane unless I'm out of town where I can get 94. That would be nice if I could get your mileage on a straight highway run at your speeds. I would be happy with that.
I have one problem now, and the problem being , I installed the Z-tube a couple of days ago, and to get the nice sound from it you must be doing 4,000 rpm and up. There goes my gas mileage
I am not a true convert to the metric system either, heck I am a member of the OF Club, and it is very hard to switch from the system you were raised with. I use these tables for calculations:
http://www.csgnetwork.com/gaskpl.html
Wayne

 

Wayne, thanks for the chart. I've got a nice neat one in the glovie put out by transport canada that calulates and converts both.
BTW I'm going to be approaching that club in another 4 years or so myself.

You're right that we both should be pretty happy with what we're getting in mileage. The car I was really impressed with in mileage was my wife's last one 225hp Acura TL that we got up to 38mpg on the highway cruising 110-115. In combined it would run about 30-31.
I've got a Z tune on the way now from the US so I may be experiencing a rev increase / mileage decrease scenario too. I usually stay under 2500 rpm unless I open it up periodically.

 

shoot! i'm getting like 6.3 kpl!!!!!!!!!

 

I work that out to 17.7 mpg to compare to my earlier post. That seems pretty heavy on the fuel unless it is all stop and go, idling city stuff.

 

15 mpg on my last tank of city driving....getting better.