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Infiniti G35 Real World MPG
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Just my opinion, but I've noticed exactly what you have on several of the cars I've driven/owned over the past several years.
This is correct.
I've posted this info in the past but my search results didn't find the post.
You actually have about 5 gallons in the tank when the miles remaining reads 0.
This does NOT mean that you can keep driving though, as you'll end up burning out your fuel pump prematurely.
The pint is that the pump needs to be submerged in order for it to be properly cooled and lubricated.
Running the tank until it's completely empty could cause the pump to have premature wear.
(I've read this in a few other tech forums and posted this info here as well)
Just drive the car as you would any other car.
When it reads 0 miles remaining, fill her up.
When she's full, put the hammer down.
Just don't calculate what you've put in and then run it way past the 0 miles remaining mark.
Yes, there's more fuel in there, but it's not yours... it's the pump's! :P
Routinely running to the full tank capacity could.
1) 25.6 mpg overall for 10K miles during six weeks in April and May between Sacramento and Charleston, swinging south thru mid-Mississippi and north thru northern North Dakota, driving up to 80 on interstates, 65 on US highways, 55 on state highways, and 45 on county roads, and a lot of slow stop-and-go when in national/state parks and small towns or when lost on scenic dirt/gravel backroads.
2) 26.9 mpg overall for 3300 miles during three weeks in June and July on a loop thru Idaho, Montana, and Wyoming. Same driving conditions as prior trip ... a combination of everything everywhere.
These mpg values are better that I would have expected, when thinking about all the low gear slow speeds climbing very steep twisty mountain roads or all the time between zero and twenty when in parks like Yellowstone during the summer and RV's are blocking the roads worse than the buffalo.
I don't do any pure City driving, so I don't suffer the lower mpg numbers.
I do get 18.x with "spirited" driving in my City/Highway mix but this is a performance vehicle and I knew what I was getting into when I bought it.
Honestly, the G's fuel economy is better than I expected it to be, and I'm quite happy with it.
It sounds like you've weighed what is most important to you and that's what's important.
If I wanted acceptable performance and had MPG at the top of my priority list, the TL would most likely had won.
I wanted AWD, and a car that could hang with the rest.
The G offered just that.
Good luck with your decision, but know that the G's mileage is better than the few people here who complain about it.
I'm very happy with my 07 G35x offering 22/27.
Just as it was predicted by 07 G owners, I started seeing a change for the better at 3,500 miles.
I'm getting 18/22/27
That being:
Spirited City-Highway/City-Highway/Highway
There's no real advantage to turning off the A/C and rolling down the windows, so I opt for comfort and keep the A/C on most of the time.
I'm hoping that its because its still in the break in period. and that it'll go up once it passes a couple of miles. can anybody confirm this? thanks
On the highway, you should be seeing somewhere between 18-20.
I also have an 07 G35x.
Once my car hit around 3200 miles, the mileage jumped quite a bit.
I do not do any "city" driving.
My commute is a 45 mph stop and go commute for the first 20 miles, and highway for the next 25 miles, with the highway seeing a good amount of traffic.
So, it's hard for me to fall into either City or Highway categories.
With this crazy commute of mine, I'm getting 18.x MPG.
This is in "M" mode, with some spirited driving techniques.
If I put the car in "D" mode, I'm getting 22.x off the highway, and 27.x on the highway.
This is a major jump in mpg from before the car was broken in.
I'm also using 93 octane fuel, which helps as well.
I don't commute t work. Its mostly for pleasure, and I do a quite a bit of highway driving (around 75-85). I would say my last (first) tank of gas i drove 70% highway.
Hopefully I will be getting much better milage once the car breakes in... Its just that it worries me a bit with the current MPG.
When was it exactly that you started to notice better milage? after 3000 miles?
B well..
Once my car hit around 3200 miles, the mileage jumped quite a bit.
Did you start using a new fuel, or the dreaded "M" mode? :P
And that's with the fact that I DO have my foot in it once in a while!
I knew what I was buying into when I got this car, thanks to my 1 yr+ of research.
I've been pleasantly surprised with my mileage.
After long enough, I decided to give it a try. About 6 weeks ago, I started to use mid-grade. Guess what, I saw immediate, significant improvement in MPG by about 3 MPG. After 3 fill-ups, I went back to premium, and surely MPG dropped right away. Now I will only buy mid grade for my G35X. I am getting 19-20 for city and 22-24 for highway.
I don't know if anyone has similar experience. But I am happy with the outcome. The car is still king of highway without noticeable drop in hp (at least from what I can feel).
I'm still on my way to my first 1000k mark. But it seems like milages are getting worse and worse! this time, i did mostly city driving... but still! how can i get 10mpg?!
i've noticed that a lot of these gas stations are starting to use 10% ethanol. do you think this might have anything to do with it?
And anybody know if there are any adverse effects of ethanol? thanks!
It hasn't ruined my numbers.
The first ever fill up gave me 13mpg, the next 15mpg .. and then 18 .. 20 .. and 22mpg ...
I now have about 2800 miles on the G ... and the mileage has kinda steadied at abt 21/22 mpg ...
So am pretty happy with it ... !
Since the car is still very new, I've been trying to stay about 70mph on the highway the majority of the time. It is easy to sneak up past that though. :shades:
so..i just wonder if other ppl got the same experience or if it is just my car which gets really bad mpg..
thanks in advance guys~!!
I have roughly 1k on mine right now, and i'm still getting AT MOST 18mpg.
I can't wait till it goes to 3k and see the jump!
Overall I'd say I'm am pleased with the MPG so far.
kc
kc
This was handed over to the wife when I picked up my G.
When I drive the MDX, I get 23.x on the highway.
When the wife drives it, she gets 18.x
There are no changing variables.
It can be on the same road, on the same day, with the same weather and temp in the same conditions, same altitude, tire pressure... everything the same.
The difference is in how she drives.
She has this habit of constantly adjusting the throttle.
It's very slight and she doesn't even notice she's doing it until I point it out, but it's there and it causes fuel efficiency to take a drop of 5 mpg.
When I bought the G, I knew the fuel economy was less than that of other sedans, but found it to be worth it for the performance I got in return.
I hate listening to people complain about the G's fuel usage being less than acceptable.
I can assure you that it has something to do with the way the car is being driven, maintained, or fed (fuel type) or everyone would be complaining, and not just a select few.
Take it on more than a 3 minute drive through the city. Give it some good 93 octane gas, check the tire pressure, get it on the highway and set the cruise to 65.
Reset the fuel economy and drive for 30 minutes without touching the gas pedal and then report on your findings.
I get 18/23 with my spirited driving and 27 and change on the highway when the ICC is set.
Not bad for a sports sedan, being driven like a sports sedan.
blaimblame wrong...Your findings do matter. If they didn't, I wouldn't have responded.
Why does everything have to become a personal affront?
All I'm saying is that I see more people posting the very most negative they can find and not the other way around.
I'm very sorry for your commute... must be a real bear driving 4 city blocks. :P
The money you save in your short trip more than makes up for what you'd spend per week on gas/wear/tear if your commute was the more typical 50 miles each way.
It's a wash.
What I was saying is that I would like to see people like yourself... with horrible gas mileage... get the car on the highway, set the cruise, and see what it comes out to.
I'd just like to see how good it gets.
Nothing but city driving, 10 miles a day round trip, that car needs a good run anyway.
If it's still lousy, then get as mad as you want, I'd still blame the driver.
Getting you mad was not the intent here.
Just my friendly retort.
Used to get 24 to 25 mpg in my Subaru Legacy GT under similar conditions, and that car has almost identical EPA ratings. I guess the main differences are that the Subaru weighed 300 pounds less, was broken in and had a manual transmission. We'll see how this car does in another few thousand miles, it should improve quite a bit, I would imagine.
I think my main issue with the G35 with regards to fuel economy is the lack of a 6th overdrive gear. 3000rpm at 70 mph is a recipe for bad fuel economy, and there isn't a heck of a lot you can do about it. I'd gladly pay an extra $500 for a 6th gear that spun around 2300 rpm at 70 mph. Hello 15-20% improvement in highway fuel economy!
My mpg experience (2007 G35x) at the 10k mark: 19mpg overall -- best 25mpg on highway. And I drive hard--excessively hard frankly--regularly exceeding 4k rpm on acceleration. But I drive that way partly because it doesn't seem to matter much to mpg. If I drive as efficiently as possible I might average 20 to 21(at most) mpg overall. This is simply not a fuel efficient car. After driving this a few years I will get my Toyota Camry hybrid (and be perfectly happy). In the meantime I love this car.
But I get 27 on the highway already, so the extra gear won't really help that much.
It certainly wouldn't help in city driving, where the car suffers the most.
It'll also wash away the "swell" affect that Infiniti was going for... and I think they succeeded in.
The car seems to have this never ending supply of power, even while on the highway in 5th gear at 80 MPH.
Of course, a lot of cars with this power will show the same affect when sitting at 3,200 RPMs!
Also remember that the 6-speed S owners are not reporting stellar numbers either.
The 6th gear wouldn't help that much, unless all gear ratios were redone.
I also drive a little more on the aggressive side.
Quite honestly, a nun would have a hard time keeping this car under 4,000 RPMs.
It just wants to be driven that way.
What we need is a little button, which switches the car into grandmother mode, kills 50% of the power, and doubles the fuel economy.
Then we can flick it when we want and have the best of both worlds.
I just passed 3000 miles yesterday. My commute is 28 miles each way, all highway, but there are 2-3 places of slower traffic, depending on the day/weather/accidents/crazy people. In addition to my commute, I have about another 5-10 miles per day that is not highway.
Friday afternoon traffic + roadworks hurts.
Interestingly enough, on this tank, I'm having trouble maintaining 23MPG. The difference being where I bought the fuel, even though it's still premium (usually it's at Mobil, last Friday I went to Costco to fill up). Maybe it is just a coincidence though.
RPMs tend to stay around 2500 at about 70-75 mph.
Is this because the car isn't "broken in" yet? I was thinking of bringing it to the dealership but I've read to wait until I reach 1500 miles?