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Infiniti G35 Real World MPG

396 messages,  Last post on Sep 26, 2010 at 4:04 PM

You are in the Infiniti G35 Forum.

What is this discussion about? Infiniti G35, Fuel Efficiency (MPG)

Messages Page 40 of 40

#387 of 396 Re: g35 premium gas [basketballgod] by rhard49

May 08, 2009 (8:40 am)

Replying to: basketballgod (May 07, 2009 6:13 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.

#388 of 396 Re: g35 premium gas [basketballgod] by pscheid

May 08, 2009 (9:12 am)

Replying to: basketballgod (May 07, 2009 6:13 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.

#389 of 396 Re: g35 premium gas [rhard49] by nycdude

May 08, 2009 (8:52 pm)

Replying to: rhard49 (May 08, 2009 8:40 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.

#390 of 396 Re: g35 premium gas [basketballgod] by ziggy66

May 11, 2009 (5:15 pm)

Replying to: basketballgod (May 07, 2009 6:13 pm)
I have a 2005 coupe with 35,000 and a 2007 35x with 39,000 and have used nothing but 89 grade. Have never seen a drop in performance or mileage. I haven't tried 87 unless my wife, bless her heart, is trying to save on gas money. If she has I never noticed and difference. The coupe get 24.5 on trips and 18.5 around town and I'm a hot dogger. The 35x gets 23.5 on trips and 17.5 around town.

#391 of 396 Re: g35 premium gas [ziggy66] by sweendogy

May 11, 2009 (6:25 pm)

Replying to: ziggy66 (May 11, 2009 5:15 pm)
14k miles and for the past 12k its been all regular< no loss of power. gas mpgs not good at 18 for the life of the car.

#392 of 396 update by sweendogy

Dec 02, 2009 (11:55 am)

not that anyone really checks this post anymore-but
 
18700 miles-- just did a 460 mile round trip east coast trip-- 95% highway and got 23 mpg with help from the digital readout.. not bad with an avg speed of 65mph

#393 of 396 Re: update [sweendogy] by dupedagain

Feb 09, 2010 (3:23 pm)

Replying to: sweendogy (Dec 02, 2009 11:55 am)
I still read this post now, how about that. I just bought a 2008 Infiniti G35 and should have done my homework about the gas mileage before I bought it. I sure do love driving it though. I traded in my 2003 Mercedes C320 Coupe, which got 20/30mpg because every stupid little thing that went wrong cost over a thousand dollars to fix. I told the salesman (reputation of used car salesman continues) that I wanted a car that didn't get worse mileage than my Mercedes. I bought it that night because I loved the drive... that's what you get for impulsive purchases and listening to a used car salesman. As an aside, I test drove the Prius and Insight... hated driving them both. I don't get all the praise... outside of the gas mileage that is.

#394 of 396 Re: update [dupedagain] by pscheid

Feb 09, 2010 (4:51 pm)

Replying to: dupedagain (Feb 09, 2010 3:23 pm)
The MB C320 is a sweet ride and a looker to boot, nothing not to like except the dealership repair costs. No extended warranty?
 
My SIL has the ML 320 (SUV), and that was his only complaint too. Until he found a private mechanic that does all of his work at roughly half the cost, and he has never looked back. No bring backs either.
 
Re the fuel mileage on the G, if you have read far enough back in this thread you know my opinions on the topic of MPG. Fun and enjoyment come with a price, and to me that price is worth it.

#395 of 396 Re: update [pscheid] by sweendogy

Aug 03, 2010 (6:16 pm)

Replying to: pscheid (Feb 09, 2010 4:51 pm)
still a tough pill to pay_ oil now at 80 soon to be 100, with that 3.50 gas at 18mpg combined = ugly

#396 of 396 another update by sweendogy

Sep 26, 2010 (4:04 pm)

3.5 yrs old 25k miles - on the 07 g35x and getting 17mpg for the life of the car-- lots of city driving where it gets under 15mpg... on the highway on a recent run i got 23mpg running at an avg speed of 71 mph.just under 100 miles. its a great car on the highways - the ability not to hit the breaks by throwing the transmission into 4th or less as needed to slow the car down -- at the ez-pass toll boths to slow down - tap it into sport mode and get up to highway speeds in the matter of 5-6 seconds and not having to worrying about passing the big rigs. I paid 3 bux today for premium -this will be 3.50 soon--then 4 bux.. I think car makers should make these cars adaptable to what kind of driving you will be doing-- and ECO mode would be nice to shut down 100 or 150 hp -- or the ability to shut down 3 cyl if needed.. just a thought I know honda (and GM years ago) have this tech but it seems it has not yet caught on and the advantages of this have yet to be fully appreshiated.

Messages Page 40 of 40

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