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Infiniti G35 Real World MPG
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Keep in mind I am driving on slightly smaller diameter and narrower winter tires 215/55-17 Dunlop SP Wintersport M3s than the Sport package 225/50-18s. But the miles on my odometer aren't off compared to computerized mapping software mileage figure. It probably throws off the odometer about 3 miles each way, but negligible since the narrower tires should getter mileage assuming the contact tread has less friction. The original tank, assuming it was full, yield 14.7mpg, but it was mostly local suburban driving other than the highway trip home from the dealership. I expect that I can get above the EPA estimates in the summer on a good run with non-oxygenated fuel. I have my hopes up!
I was wondering if that fact that the car is used with 9k miles on it, would it get better mileage do to it being broken in.
Personally this car seems to fit me. I'm not a speed racer. I don't care that"fun" to drive, when I hear that it screams of young 25-35 yr old males. Anyway, I drive in bumber to bumper traffic on the highway m-f where frequent accidents occur, almost every weekday and I want a car that can get out of the way of fools on the highway.
I'm attracted to this car because of price and reliability. I like to keep car 10-11 years. But this MPG seems like its going kill all of my savings. I was think about Camry but a family Sedan is overkill for me.
"In town", the daily 18 mile trip to the office (12 are freeway), and the regular mix of surface streets and freeway driving are registering 17 - 19 MPG.
The mileage has definitely improved since we got the car December 31, 2007. For the first week of ownership, driving consisted mostly of freeway trips in town. I was seeing 14.5 to 16 MPG and was getting WORRIED. Since that time the MPG has definitely improved.
I gotta say, it is hard to keep the car below 80, it just FLIES. Most impressive is the power band. It has power across the rev range. I have a friend with a 2007 Mustang GT. I'd think his car would be quicker, but the longer I own the Infiniti, I am not so sure. What's more, ours is pearl white. At a glance it is very attractive, but somewhat unassuming looking, a true sleeper with BMW 335xi class power.
Also my friend has a Vette and it gets better gas mileage.. kinda sucks to think his car can go faster too...
LOVE TO DRIVE THE G.. I know I am complaining, but I dont know if it really matters that much when I am on the hwy and wanna pass someone and dont have even down shift, just give a lil gas and I am at 85 in no time
I regularly envy C6 Corvette's, but sometimes, really need more than two seats. From a performance point of view they have no peers anywhere near their price point.
Thanks
Z
Z
I don't beat on it, but my car has two speeds.... fast and faster, and I like to get there quickly.
I have never seen it get below 17MPG, even with NE winter blend fuels.
I'm down 1 or 2 mpg during the winter, but I'm still hanging in the 17-26 range, depending on driving style and highway vs in town driving.
Fuel efficiency sucks when compared to the seven different Acura TL's that our Acura dealer kindly loaned me. (MDX Oil Changes)
I got 37 mpg on the highway going to work one day. 37!
I chose the G for it's technology and fun factor... and it's a damn classy car too.
If I worried about the MPG, I certainly would have shopped elsewhere.
Dunno :confuse:
My experience is that unless you're redlining it in every gear from every stop, you should be seeing much better mpg than you're reporting.
FWIW, I'm in a 6MT not a 5AT though.
Hopefully this car ages like wine.
I drove a 2008 G35x for a day as a loaner and at the lowest point the MPG was 19.7, with a pretty even mix of highway and city driving. On that day it was only a maximum of about 8 degrees F. There were a couple of inches of snow that evening, so I did run the car for about 5 minutes, while cleaning it off.
As a sidenote, it was impressive that the VDC didn't come on at all even though the roads were not cleared (although I wasn't driving like a moron). I'd never driven an AWD before, so that was a good time to test out the differences.
In mine, if I get just a *little* too enthusiastic than I meant to in the slush or snow the VDC flashes on briefly in low gears, although sometimes, I am not really detecting a loss of traction. This is with the Blizzaks installed.
However, with all the bells and whistles, plus the Winter tires, I still feel a lot more in control than when I was driving around in my FWD 2004 VW Golf that I traded in.
I am 77 years old but not too old to learn. I guess quality pays!
Good luck to any that care and understand that there is a gas Angel.
Paul
Good for you John! My driving cycle was and is always the same. You made my posting very worth while even if no one else pays attention. Most people are so negative on everything and the world just passes them by. No offense to the stupid people of this world, ha.
I think the world may need the two of us, ha!
Nice meeting you John.
Paul
El Cajon, California
Lucky you. Hope that continues for you.
I normally put in Speedway Premium. Just for a change, I tried Shell Premium with my last fillup. No difference. I average about 16-17 in suburban Chicago driving. I would have been glad to switch to Shell and pay a bit more if there was an improvement.
I mainly do city driving, and although I am suppose to get somewhere around 12.6L/100KM city driving. I get no where near that. I am averaging about 20.8L/100KM.
I haven't been driving it hard or fast, just normal driving.
Any ideas, is this just because it's a new car? I've also noticed my cold start idle to be rough at times with minor vibration being felt, or when I am stopped at a stop light, the rpms fluctuate a very small amount. Definitely not steady like my old car. Not sure if this has anything to do with it.
Read the other threads here on the G forum.
Once you get up around 3,500 miles on the car, it should improve.
Highway cruising will also bring it up as well.
Z
11MPG is bad unless your traffic is really bad. The lowest I get is about 15MPG when I'm not working and I just need to drive around my house 2 or 3 miles w/ 10 stop lights or so.
Depending on the driving mix, my 2008 G35x (odometer at just over 4000 miles) gets 16.5 - 18 MPG in town. My driving is mildly brisk.
I haven't taken a long road trip recently, but at around 1500 miles I took a 800 mile trip and averaged a little over 23 MPG on the highway driving 65 to 75 MPH.
I'd be curious to get your take on how your G35 performs relative to your M3.
The ECU update DID help to smooth out the abrupt up shift to 3rd gear, BUT the car does "feel" a bit slower......with apparently lower gas mileage. I wonder if I did the right thing by allowing the ECU update :confuse:
As an aside, when gas gets to $100/gal, I believe we all better consider walking.
Z
First off, Octane prevents combustion not aids it. Secondly, you get knocking because the gasoline explodes in the cylinder before it is supposed to, not because there is extra fuel is floating around.
The motor in the G35 and many other cars like your Bimmer and Lexus use anti-knock technology (timing retard, etc.) to prevent knocking when you use the cheap gas. You're robbing the car of power.
I bought a 2005 G35 sedan in December 2007. Car had 26K miles on it.
Changed oil, replaced the original (!!!) dirty air filter and put 4 new tires on it - 245/45R17.
I was getting 15/20 MPG, using regular gas and driving 75 - 80 MPH on the highway. Took it to Miller Infiniti in Van Nuys, California and asked why.
Dealer said the engine was fine, the emissions were fine and everything looked great, but made the following observations that contribute to the situation:
1. Tires are larger than the recommended size and put more pressure on the engine in certain situations.
2. Air filter was dirty.
3. Carbon build-up in the throttle body and fuel injectors.
Changed air filter for the second time in 3 months, had my mechanic clean the throttle body and put some fuel injector cleaner into the system and it did not seem that anything has improved.
Reading some of the posts here, I guess this is the norm and we should ignore Infiniti's own MPG rating and definitely the EPA rating of 18/25.
And I sold my 1998 Lexus LS400 (which did 17/21), hoping to save some money on gas... Silly me!
Until recently (and I mean about 37k) I never got above 20 MPG highway (70-80 mph).
The last few gas tanks got me as many as 23 (once) and 22 MPG.
City driving is another story. I must apologize to the many people who define "city" as driving on a road with lights going 40-60 mph. City driving is Brooklyn, NYC, where you go as many as 5 lights without stopping (about 0.5 mile), then peel off the line to smoke the V6 Mustang that thinks it has a chance -- and then repeat at next light. Even without peeling off, I never got above 15 MPG. With "spirited driving", my worst average was 12.4 MPG around city.
If you live in a real city (I've been to Pittsburgh, Philadelphia, Buffalo -- you haven't lived until you've sat in traffic on the BQE during rush hour, and I apologize for the gruesome details -- I just want to make sure we compare apples to apples), the G is not likely to ever break 15 MPG.
A quick note on the air filter - I replaced the OEM with a washable K&N. The filter does get dirty in about 1 month -- I think the reason for that is that one of the air intakes is very low behind the front bumper. I used to wash it religiously, then I pretty much gave up -- with no real change in MPG.
I've tried using the "recommended" 91 octane gas (went through about 5 tanks to make sure I would notice a difference if there was one) -- aside from a slightly slower takeoff, no real change.