- #357 of 391
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Re: how are you all getting these numbers [paulo6]
by johninnj
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Nov 22, 2008 (6:10 am)
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Replying to: paulo6 (Nov 21, 2008 6:53 pm)
My 07 is just as bad. I blame the gearing primarily...with, of course the right-foot issues like the other post. I had a friend with an 05 coupe 6mt...and he did much better on the highway. Infiniti raised our redline to 7500, then took the liberty to adjust the gears accordingly. I would be interested in a post from someone with the new 7sp auto. We have a VERY good aero design (And even have a belly ban under the engine), but spinning a 3.5 liter that high on the highway HAS to burn fuel....no real way around it.
My car has 14K...it's gotten slightly better. I actually did better on reg than premium...but that one still escapes me.
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- #358 of 391
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Re: how are you all getting these numbers [pscheid]
by paulo6
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Nov 22, 2008 (6:25 am)
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Replying to: pscheid (Nov 22, 2008 5:51 am)
Thanks for feedback, but again I am comparing to other posts with AWD (added weight)...I will wait and see what happens next summer when the weather warms up and my car gets broken-in more. But with 15 years in automotove industry experience, etc. I just cannot imagine these factors can improve my MPG from 17 now (This is with EASY driving intended to see how high of an MPG I can get - If I drive my car NORMALLY I am lucky to hit 15) to lets say 23 MPG as a lot of the posts indicate...thats a 35% improvement!!!!
In the meantime I will continue to experiment (Higher MPGs) and have a blast with my G (Dismal MPGs)...
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- #359 of 391
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Re: how are you all getting these numbers [paulo6]
by sweendogy
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Nov 22, 2008 (8:38 pm)
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Replying to: paulo6 (Nov 22, 2008 6:25 am)
my thoughts on mpg-- i drive a 2007 g35 X -- my mpgs have increased a bit as the car has aged --just 11,300 miles on a car thats over 1.5 years old and i have seen mpgs of just over 17 for the life of the car ( I got the car with 20 miles on it). I must admit most driving has been city. Now what i've found-- city mpgs are terrible --but thats the norm on such a car with a 5 speed auto and high HP.. past post are right the new transmission of 7 speeds should help..I think the 300 lbs of the awd hurts mpgs-... The 5 speed is not the best trans --for sure-- the maxima and altima are cars born on the same platform and get way better mpgs then the rear drive G (with less hp --to the drive wheels.) .. I changed my driving habits as gas hit the 4 (and more) dollar mark here in MASS.. but now that gas is back down under 2 bux here I will drive the car harder and will sacrifice MPGS to get to 80 mph faster.. If your looking for MPGS --its easy -turn off your V1-stay , stay off the gas and use cruise control on the highway. I can tell you this -- I have started using the manual mode more and have found the sounds delightful coming from the back end of the car.
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- #360 of 391
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update on mpg's
by sweendogy
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Nov 29, 2008 (6:34 pm)
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600 miles this long thanksgiv weekend.. 2 fillups -- 23 and 23.4 on each. 90% highway with average speed of 65mph (according to the computer). used premium on my first fill up -- regular fuel on the second-- have not seen a difference in performance or mpgs.
sween
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- #361 of 391
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800 miles during x-mas
by sweendogy
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Jan 03, 2009 (12:32 pm)
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car has now 13k miles on it --its an 07 g35x --mpgs have kind of flatlined.. 2 fillups one premium for 1.79 a gallon then regular at 1.47 (thank you south jersey) the mpgs for the first tank were 22 mpgs-- now mind you this was going south from MA to NYC 200 miles at around 42 avg mph during a snow storm. -- second tank going at an avg of 60 on the way back from the POCONOS to BOSTON I got 24mpg.. on the highway this is a great driver-- city driving here in boston kills mpgs bigtime--i'm talking 12-15 mpg..
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- #362 of 391
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Re: 800 miles during x-mas [sweendogy]
by paulo6
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Jan 03, 2009 (3:09 pm)
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Replying to: sweendogy (Jan 03, 2009 12:32 pm)
Was this based on the trip computer readouts or your own calculations?
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- #363 of 391
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Re: 800 miles during x-mas [paulo6]
by sweendogy
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Jan 04, 2009 (11:18 am)
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Replying to: paulo6 (Jan 03, 2009 3:09 pm)
own calculations - i did use the computer to calculate the avg speed.
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- #364 of 391
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Re: 800 miles during x-mas [sweendogy]
by paulo6
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Jan 04, 2009 (2:06 pm)
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Replying to: sweendogy (Jan 04, 2009 11:18 am)
Do you know how well your own mpg calculations correlate to the trip computer calculations? Wondering how accurate the trip computer calculations are.
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- #365 of 391
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Re: 800 miles during x-mas [paulo6]
by sweendogy
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Jan 10, 2009 (3:26 pm)
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Replying to: paulo6 (Jan 04, 2009 2:06 pm)
the MPGS on the car computer are pretty close usually within .4 mpgs.. The only wish is the gas gauge would give a more accurate miles left on tank--i recently had the warning light go off --after driving another 20 miles -I filled up-- and was able to fill over 18 gallons of gas --so another 40-45 miles of highway driving.. This was not the first time. I think the warning light triggers with less then 4 gallons left inthe tank.. --ITs also pretty scary seeing "*****" on your nav screen--
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- #366 of 391
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Re: 800 miles during x-mas [sweendogy]
by paulo6
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Jan 10, 2009 (10:39 pm)
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Replying to: sweendogy (Jan 10, 2009 3:26 pm)
I know the last 30-40 miles TO GO disapear within 10 miles (or even less) usually and I get the scary ******. My car (08 G35Xs) has just over 3K on it and I struggle to get 17MPG on combined driving (mainly city). I still struggle to get to 20 when I am on HWY though. I am blaming cold weather and NEW car factor...will see what happens in summer. This triggered my Question regarding accuracy of trip computer.
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