Gas mileage question

[lmottel]

I have an 07 G35S with about 22K miles on it, I just recently purchased it. According to the specs I should be able to get 24 MPG on the highway...I cant really get more out of the car over 21...and I am not driving crazy. I noticed it idles around 900RPM...isnt that too high? Also, it is around 3500 RPM at 80MPH...is that normal?

thanks

[pfarmer]

I have an 07 G35S with about 22K miles on it, I just recently purchased it. According to the specs I should be able to get 24 MPG on the highway...I cant really get more out of the car over 21...and I am not driving crazy. I noticed it idles around 900RPM...isnt that too high? Also, it is around 3500 RPM at 80MPH...is that normal?

thanks

My 08 gets a combined of between 22 and 23 depending on weather.

Perry

[joe603]

You idle is fine...Are there any mods on the car? Have you changed the oil/filter, air filter?

[pfarmer]

I have an 07 G35S with about 22K miles on it, I just recently purchased it. According to the specs I should be able to get 24 MPG on the highway...I cant really get more out of the car over 21...and I am not driving crazy. I noticed it idles around 900RPM...isnt that too high? Also, it is around 3500 RPM at 80MPH...is that normal?

thanks

Any wiring changes? I was thinking the idle sounds just a 'little' high but not substantially so. I'll have to pay attention today when I jump into my 08.

Perry

[kmckis1029]

my 05 auto idle is 650-750 rpms...

i think thats a different engine from my 05 though... just adding my two cents...

[pfarmer]

my 05 auto idle is 650-750 rpms...

i think thats a different engine from my 05 though... just adding my two cents...

It seems to me that once warmed up mine is somewhere around 800, however I forgot to look.

I noticed something today I haven't noticed before. If I run in DS first gear and take it up to about 15 mph and let off the throttle that the engine will actually pick up slightly before dropping. Did it a couple of times, not sure if it will be repeatable tomorrow. Almost sounds similar to the Chyslers rear ending other cars problem in the drive throughs of Taco Time.

Perry

[Monkeyboy88]

I'm getting 23 with about 70% highway and 30% local driving.

[telcoman]

I have an 07 G35S with about 22K miles on it, I just recently purchased it. According to the specs I should be able to get 24 MPG on the highway...I cant really get more out of the car over 21...and I am not driving crazy. I noticed it idles around 900RPM...isnt that too high? Also, it is around 3500 RPM at 80MPH...is that normal?

thanks

My G35 is at 3k RPM at 80 MPH. I frequently exceed 24 MPG but outside temperature is a very significant factor in my MPG. If early morning temperatures are below 20* my mileage drops to 21 or 22 from 24 and 25 when the temperatures are in the 50s & 60s and aboveI only drove 5 speed automatics as loaners and it seemed they sucked up gas much more than my manual 6 speed.I recently drove an 09 7 speed automatic for about 150 miles while getting new plugs. At 80 the tach was around 2500 RPM and it seemed to suck up less gas than the previous 5 speeds.

Here is what I've discovered.I Fill tank to shut off. Add a little more perhaps another 1/2 gal to an even dollar amount. $32.00 $33.00 etc

As the gas gauge needle is square on the 1/4 mark if I'm over 120 miles and 230 miles square on the 1/2 tank mark I know I'm getting decent mileage.I've filled up with the needle exactly on the half tank mark and it takes less than 10 gallons. The 1/2 tank mark on my gas gauge is not at the 10 gallon mark in the tank.

Telcoman