Poor fuel efficiency?
 

Hello All,

I recently purchased a 2012 370 w/touring, sport package and manual transmission. Prior to the Z I had a 2010 Maxima. I purchased the Z with the expectation of getting around 20mpg. The sticker lists 18-26mpg, the sticker on my Maxima listed 19-26mpg which resulted in 22.5mpg for the same basic driving routine as I do in the Z....so my natural assumption was about 20mpg for the Z. Nope, I'm getting 17.4mpg after the first 1K miles. I'm driving it easy through the suggested break in period of 1,200 miles, using only 92-93 octaine fuel, mostly shifting between 2k-3k rpm. Any thoughts of what's causing such poor fuel efficiency? Are you experiencing this too? Other than this I love the Z but if I would have known this up front I might have reconsidered the purchase. Pretty sure I can get V8 muscle at 17.4mpg. Thoughts?

Welcome OP! You are still in your break in period, after 1200 miles she'll give you the same or better gas mileage (all depends on driving style). Keep in mind too, the 370z is the most fuel efficient sports car with the level of performance it provides. Also, sports cars are about having fun in, not watching your gas gauge while enjoying them. :tiphat:

We'll there's a thread on people posting there mpgs some get 25 some get 22 some get 20 some get 15 eh search bar!

Sent from my SCH-I535 using Tapatalk

According to my in-car computer or whatever you call it. I'm only averaging 10.8 mpg @ 11 MPH or something like that...590 miles on her already. I'm not sure if it's normal or not, but it's been stuck on that number since delivery. But based on my most recent fill up, I'm getting around 14.8. All city, no highway and shifting around 2500 rpm.

It also depends on driving conditions. If you drive in a lot of stop and go traffic, expect to get poor gas mileage in the Z. If you're on the interstate getting those kinds of numbers, then something isn't right.

I get around 18.5 average but I deal with a lot of traffic every day. Even on the interstate. When I did a little longer interstate trip a couple of weeks ago, I was closer to 22 or so.

I love the Fuelly website for keeping track of all my fuel usage, prices and mileage. It can really help you with tracking your results over longer periods of time so you can spot trends on your fuel economy. Plus, it gives you a nice record of how many miles you're really driving during any given time period.

Yep :iagree: Especially the part about "sports cars are about having fun in, not watching your gas gauge while enjoying them" These are not practical cars no matter how you try to spin it. ;)

I agree this car eats more gas than the Nissan Titan, I wish I would saved up more and got a boss mustang or m3

I would expect around 22 - 24 mixed driving with the occasional run through the gears. Unless you're driving a lot of stop-and-go that does seem awfully low.

My '12 is still in the break-in period and I believe I've been getting around 24 mpg. As far as driving style/break-in I pretty much let it rev to close to 4,000 RPM every time I run through the gears.

Keep in mind that the motor in these cars is not making much torque at low RPM so it's not efficient there, at 2,000 RPM. What I'm saying is... I suppose maybe you could be getting slightly worse mileage due to short-shifting but less than 18 mpg seems pretty extreme and I expect you have an issue of some sort.

First, how are you getting the numbers. I average around 22-25 mpg of mixed driving...and have gotten close to 30mpg of all highway. I tend to drive on the spirited side also most of the time. If you're going to use the on board computer, make sure you reset it first by holding down the button. You can't go fast without burning more fuel...period. I hope you're joking with v8 'Muscle' cars getting better fuel economy.

Yes, I agree. Why would you believe the EPA estimates for the muscle cars are any more accurate than the ones for the Z? They tell you 18/25 or something like that but unless you drive like a grandma and upshift at 1800 RPM you'll never see it. :D

Lol. Yea I filled up first time last night. I don't even look at my average. Too busy driving the crap outta the car to care lol. It's nice to be able to valet a nice car for once. Makes me feel special lol. Yes sir, park it up front. :P

21.4 mpg in mixed driving (60% city)

I too once got 17.4 during break in. I have never seen that high mileage again driving the same roads since. If you want good gas mileage, I think you should have reconsidered the purchase. But you will have a good time.

It's the fuel as well using ethanol you won't see as good of gas mileage with it and during the summer the hotter temps you will use more gas.

Same mileage I get driving nicely as well and I have a 60 mile round trip.

Just have fun with it.
 

Welcome OP,

Man just drive the car and don't look at the gas mileage. The car was meant to be driven fast and never looking down at the gas meter.

but the 370Z isnt that fast...

The man is right, you didn't buy the Z for gas mileage. You wanted to have fun with it, not drive it like a prius.

With that being said, maybe it comforts you if I told you my Z has about 17.4 MPG. I drive about 20~30 miles a day, half street/half freeway.

I've never bought a car for the mileage to be honest. That said I do keep track of it oddly enough. I bought my '12 roadster in May and was getting about 16 mpg (US gallons) to begin with. At slightly over 2k miles now it sits at 19 right now with my mix of freeway/city driving which is spirited to say the least. I'm out to have fun and the mileage doesn't factor into my enjoyment.

In short it will improve so don't sweat it and enjoy! :driving: :tup:

I drive about 70% highway and get between 21-23 usually. I agree sports cars are meant to have fun in...I was more conservative when I first got my Z as my last car got around 32 mpg, but the more you drive it, the more you will realize its more fun to use the HP and dive into those turns.

I drive the exact same route every weekday, and usually dont drive on the weekends. It ends up being right at about 400 miles a month, and I only have to fill up once a month. I think I get great mileage personally.

All you do is bitch and cry, and none of it is going to change the fact that you chose to lease a vehicle you dont like. I guess I shouldnt have put that gun to your head.

Jeff's BR-Z is netting him over 30mpg, but I think he's like 60% hwy.

My Z is netting me 18-19mpg because I drive 85% city.

If it makes you feel any better, my co-worker's 5.0 Mustang is netting him around 16MPG for 65/35 city/hwy.

Are all of your posts meant to troll?

Damn, I would have thought he could have gotten at least 18 in that scenario. Do you know what are his normal shift points? I know from driving them, that you have a bunch of torque down low.

My 2000 Mitsubishi Eclipse GT 4 speed auto is rated 18 city, 25 hwy, 20 combined.
Using Torque Pro for Android and a $12 OBD2 bluetooth module I've been able to improve my combined gas mileage to over 29 MPG. It helps seeing your gas mileage as you drive and how easy it is to improve it by adjusting the way you drive.

http://farm9.staticflickr.com/8439/7...828aa2a143.jpg

OP:

Welcome to the forum. The Z is sorta finicky when it comes to fuel economy. I used to get decent fuel economy in the awesome Killeen stop-and-go traffic and I ran my AC constantly to keep from passing out in the 100+ degree heat. I would say that I am getting about 13MPG right now while battling a pig rich condition. I am running a TT kit as well, so it is to be expected. If you can drive over 45MPH for a decent spurt, then you will get good fuel economy. If not, just have fun getting to the speed limit as quick as you can and just deal with it. The cops around here hate it!

Oh yeah, I almost forgot to address you guy. You should really have looked before you leaped. My Z is fast. Perhaps your Z has an issue, which I doubt. I believe you have the issue. Check out your car, but more importantly check yourself. You made the decision...........deal with it and stop cluttering threads with your trolling! :tiphat:

however, it is faster than my 8 :icon18:

:iagree: surprised that guy hasnt been banned by now with the amount of non helpful trash that gets typed out by him

if your looking for MPG..... people should not get a SPORTS car...... its called a SPORTS car for a reason... not a sedan. means its meant to be driven differently than the non sport cars of its class lol.

for me im getting 23 MPG on the highway.

just looking at it in the garage will do a few things..... 1. give you whiplash... 2. make it seem like your getting Less MPG.....when parked.

I normally get around 12 MPG all city, hills, etc., and that means I enjoyed the fuel. Pay to play.

I just got 15 MPG and I am unhappy since this reflects driving slowly, being stuck behind tourists.

That is why 8 MPG at the track is so much fun. :D

car eats a lot when new.

:iagree:

Spent the last 256 miles trying to see what mpg i could get driving like my mother. I'm at 25.4 in 61% highway driving (yes, I calculated that too)

Thanks to those of you who have provided constructive suggestions or information. It's not that I'm so concerned with the mpg that I'm not enjoying the car, the car is awesome! I just have a reasonable concern based on a reasonable expectation set by the manufacturer and their estimates. Clearly other people have the same concern otherwise they wouldn't be responding with their results or tracking their mpg. That being said, I do believe it has some to do with the break-in period. The onboard computer is now showing 18.3 after about 1,300 miles of 70% city/30% highway.

the onboard computer isn't always so accurate. I usually calculate my mileage myself based off of gallons pumped and miles travelled since last fill-up. Some times it's spot on but more often than not, it skews high .5-1 mpg for me. I still get 20-22 in mixed driving based off of my own calculations though.

I get about 13.4 mpg.:ughdance: Guess that means i should slow down.:driving:

Their tests are basically done with no factors. No hills, no wind resistance, and no tire resistance. Basically they drive it on a Dyno and those are their numbers. If you live in a hilly area, your gas mileage will be lower then us that live in flat areas. This also has to do with lack of torque and needing to rev a little more since the cars stutter a bit under 2500 so its hard to granny shift as it is lol.

:iagree: