- #380 of 391
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A Year with the G35Xs
by bg18947
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Feb 12, 2009 (12:07 pm)
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Worst mileage rating I got was 14.5 MPG of pure local driving (NYC burbs)
Best non-winter fuel mileage was 24.4 MPG going from NJ to ME (pure highway) with the stock A/S Dunlops
Best winter fuel mileage was 23.4 MPG going from NJ to NH (pure highway) with the winter Dunlops
Highway speed probably averages about 72 MPH. Too many speed traps in CT, so I have to watch it. It is tough to drive this car slow, but it is tougher paying speeding tickets and higher insurance rates.
Averaging about 21.5 MPG with 70/30 Highway/Surburban driving
I'm satisfied with these numbers that I am getting.
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- #381 of 391
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Re: A Year with the G35Xs [bg18947]
by sweendogy
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Feb 13, 2009 (6:26 pm)
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Replying to: bg18947 (Feb 12, 2009 12:07 pm)
how many miles on that puppy??
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- #382 of 391
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Re: A Year with the G35Xs [bg18947]
by almatti
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Feb 13, 2009 (7:53 pm)
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Replying to: bg18947 (Feb 12, 2009 12:07 pm)
I'm in the NYC Burbs too. Worst mileage in "city" driving to train station 4 miles to & from in the winter blasts recently : 11.5 mpg. Otherwise I'm getting very close to what you reported bq.... 2007 G35X, Auto, premium package, No Navi.... now with 16k miles on the clock. just had a faulty tranny valve body replaced under warranty - it was a very shift into 3rd gear. With the new valve body, it is much better. I'll see if that affected mileage any in the next few tankfuls. PS, I really don't warm 'er up too much [1 minute or so], and I Don't driver 'er like Grandpa going to Stop n Shop either, although during these commutes, I don't push it hard.
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- #383 of 391
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Re: Infiniti G35 Owners: MPG-Real World Numbers [KarenS]
by amissner
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Mar 04, 2009 (4:41 pm)
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Replying to: KarenS (Jun 16, 2005 9:26 am)
For my automatic 2007 G35 Sedan I get 20MPG for almost every tank with a mix of city and highway driving.
Recently drove to Orlando and got 22.3 MPG averaging 70.9 MPH for 477 miles. Pic of odometer: http://flickr.com/photos/missner/3328957009/sizes/m/
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- #384 of 391
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Re: Infiniti G35 Owners: MPG-Real World Numbers [amissner]
by sweendogy
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Mar 06, 2009 (5:45 pm)
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Replying to: amissner (Mar 04, 2009 4:41 pm)
that is really interesting -- i did a 400 plus mile round trip on weds/thurs from boston to manhattan.. I got 22 mpg for the tank as well and didnot see 400 miles on the trip computer before the stupid warning light went on to tell me to fill up -- had over 3 gallons left on the tank and it still the warning. 13400 miles on a 2007 g35x sedan,
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- #385 of 391
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another update
by sweendogy
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Apr 10, 2009 (12:58 pm)
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14200 miles on the car - again mostly highway over 400 miles got 22.6 mpg-- this is prob the top end of the range-- most of my posts have been 22 or so-- with city driving a terrible 12-15 mpg. G
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- #386 of 391
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g35 premium gas
by basketballgod
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May 07, 2009 (5:13 pm)
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has anyone used regular gas on their g35 instead of premium, and if so how was that affected your car. thanks for your help
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- #387 of 391
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Re: g35 premium gas [basketballgod]
by rhard49
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May 08, 2009 (7:40 am)
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Replying to: basketballgod (May 07, 2009 5:13 pm)
Yes I have, I initially had a lot of hesitation in my car being pissy I figured I'd try regular. It felt like it ran better and the hesitation disappeared, using regular is not going to harm your car you have a knock sensor that is going to retard the timing reducing the power at the detection of any knock or pinging. I haven;t gone back to premium but I do fill my car half 93 half 87 when I'm on E.
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- #388 of 391
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Re: g35 premium gas [basketballgod]
by pscheid
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May 08, 2009 (8:12 am)
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Replying to: basketballgod (May 07, 2009 5:13 pm)
I agree with rhard. The knock sensor works perfectly and retards the spark to protect the engine. While there is a slight drop drop in horsepower and torque using the lower octanes, it was not that you would notice it. My fuel mileage didn't drop either. But I always use a name brand fuel to get the cleaning agents.
The only car manufacturer I am aware of that lists in their web site horsepower and torque differentials between premium grade (91-93 octane) and regular (87 octane) is Hyundai. For their new 370+ horsepower Genesis! I was staggered that the hp and torque drop-off was so negligible, only a few hp and lb. ft.
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- #389 of 391
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Re: g35 premium gas [rhard49]
by nycdude
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May 08, 2009 (7:52 pm)
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Replying to: rhard49 (May 08, 2009 7:40 am)
I started moving away from premium gas when i had my M35 and gas prices were going up daily. I used 89 octane and am still doing so with my 2008 G35. Absolutely no ill effect. I'm not sure, but I think with 89 you would have the equivalent of 1/2 tank 93 + 1/2 tank 87. 
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