2014 370z Sport only 11 mpg

Endlessnoob · 03-13-2014, 01:55 PM

Hi guys, I am driving a 2014 370z Auto with Sport package, the car now has 1600 miles, I'm driving the car daily pure local with a lot of stops, I'm not pushing the car so hard, it usually shift around 3-4k rpm, shift at 7500 rpm for a couple times maybe. I just filled my tank yesterday and it was 13.082 gal and it ran 142.5 miles. so it has only 10.89 MPG...not even 11......I'm wondering if this is normal? should I drive to the dealer and ask them to check? Please advise

thanks a lot.

kenchan · 03-13-2014, 01:58 PM

i would try driving on hwy at 50-55mph constant for 10-20miles to see how the mpg is affected. if it still doesnt improve i would say take your car to the dealer.

chances are, you're a tad heavy foot and just enjoying your new car while the car is breaking in.

Chuck33079 · 03-13-2014, 02:00 PM

Not normal at all. I wouldn't go to the dealer just yet though. Give it a few more tanks so you can get an average.

Zteve · 03-13-2014, 02:03 PM

have you been resetting your mpg at each refill? if not you will get a running total versus each tank mpg and that will be way off. plus if you do a bunch of city driving at low miles it will be low as well. go take a long drive on the highway like suggested.

Arrvaxx · 03-13-2014, 02:03 PM

Use the display for average fuel economy too. Compare that to what your tank fill technique is telling you.

Endlessnoob · 03-13-2014, 02:03 PM

I was driving like an old lady for the first 1200 miles, I thought only the first 1200 miles are the break in period? BTW, the computer says the average speed is like 16 mph, too slow?

Chuck33079 · 03-13-2014, 02:05 PM

Quote:

Originally Posted by Endlessnoob

I was driving like an old lady for the first 1200 miles, I thought only the first 1200 miles are the break in period? BTW, the computer says the average speed is like 16 mph, too slow?

1200 miles is the break in period, but the motor will continue to break in for some time. 16 mph average is very low. If all you do is drive in traffic, mpg will be low. Give it a few more tanks and keep track. It'll get better.

kenchan · 03-13-2014, 02:06 PM

Quote:

Originally Posted by Endlessnoob

I was driving like an old lady for the first 1200 miles, I thought only the first 1200 miles are the break in period? BTW, the computer says the average speed is like 16 mph, too slow?

roy'sz · 03-13-2014, 02:07 PM

depends on how long you are idling for at stoplights, traffic, how heavy your foot is, your shifting patter as far as how long you linger in a gear at medium revs. That is actually how you should be calculating your mpg. I drove from palmdale, ca to las vegas, nv in Jan. I filled up and drove up hwy14 to the 15. I avg'd 28mpg up and 26.5 on the way back. Had I not drove around in Vegas I would have gotten approx 520miles on a tank and had almost half a tank left. Hope this puts it into perspective.

Endlessnoob · 03-13-2014, 02:09 PM

Quote:

Originally Posted by Zteve

have you been resetting your mpg at each refill? if not you will get a running total versus each tank mpg and that will be way off. plus if you do a bunch of city driving at low miles it will be low as well. go take a long drive on the highway like suggested.

the 10.89 is not the number showed on the computer, it is mileage last tank / gas filled this time. the computer showed 15 mpg, but i never reset it since I bought the car. I just reset the MPG this time after I filled the tank, and now it shows 13.8 MPG / 14 MPH

Chuck33079 · 03-13-2014, 02:10 PM

It's probably a combination of things. You're driving in low gears at medium rpm, lots of stop and go, a new car breaking in, etc. Make sure your tires are inflated enough. Try shifting under 3k rpm.

Mitco39 · 03-13-2014, 02:19 PM

This thread is a downer. Here I am just sitting here waiting for snow to melt so I can get the best 6mpg of my life while I try and get my fix before the next snowfall.

*shoulda bought a prius* lol.

It does seem very low for stock though, something is not right. Can you hear any exhaust leaks perhaps?

Endlessnoob · 03-13-2014, 02:22 PM

Quote:

Originally Posted by Mitco39

This thread is a downer. Here I am just sitting here waiting for snow to melt so I can get the best 6mpg of my life while I try and get my fix before the next snowfall.

*shoulda bought a prius* lol.

It does seem very low for stock though, something is not right. Can you hear any exhaust leaks perhaps?

I can hear tick tick tick sound after I park the car, is that the exhaust leaks noise?

Chuck33079 · 03-13-2014, 02:23 PM

Quote:

Originally Posted by Endlessnoob

I can hear tick tick tick sound after I park the car, is that the exhaust leaks noise?

No. That's not an exhaust leak if the car's not running.

BigT · 03-13-2014, 02:24 PM

Sounds like you're driving in NYC or any other big city. Frequent stop and go along with low speeds = terrible gas mileage.

03-13-2014, 01:55 PM	#1 (permalink)
Endlessnoob Base Member Join Date: Feb 2014 Location: Houston Posts: 18 Drives: 14 Nissan 370Z PW A7 Rep Power: 11	2014 370z Sport only 11 mpg Hi guys, I am driving a 2014 370z Auto with Sport package, the car now has 1600 miles, I'm driving the car daily pure local with a lot of stops, I'm not pushing the car so hard, it usually shift around 3-4k rpm, shift at 7500 rpm for a couple times maybe. I just filled my tank yesterday and it was 13.082 gal and it ran 142.5 miles. so it has only 10.89 MPG...not even 11......I'm wondering if this is normal? should I drive to the dealer and ask them to check? Please advise thanks a lot.

03-13-2014, 02:00 PM	#3 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	Not normal at all. I wouldn't go to the dealer just yet though. Give it a few more tanks so you can get an average. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

03-13-2014, 02:03 PM	#4 (permalink)
Zteve Enthusiast Member Join Date: Jul 2013 Location: Clarksville TN Posts: 348 Drives: 2013 370Z MB w/Sport Rep Power: 3368	have you been resetting your mpg at each refill? if not you will get a running total versus each tank mpg and that will be way off. plus if you do a bunch of city driving at low miles it will be low as well. go take a long drive on the highway like suggested. osbornsm and Riptide67 like this. __________________ 2013 Midnight Blue 370Z Base w/Sport Package

03-13-2014, 02:03 PM	#5 (permalink)
Arrvaxx A True Z Fanatic Join Date: Jul 2013 Location: Whore Island, MN Posts: 1,243 Drives: 40th F.I. Twin Turbo Rep Power: 17	Use the display for average fuel economy too. Compare that to what your tank fill technique is telling you. __________________ 2010 370Z 40th Anniversary (#480 born 1/19/2010) Fast Intentions Twin Turbo \| Varis Arising II \| Limited Edition Recaro Sportster \| Tuned by Specialty Z \| 604hp 525 torque @14lbs boost on 100 octane

03-13-2014, 02:03 PM	#6 (permalink)
Endlessnoob Base Member Join Date: Feb 2014 Location: Houston Posts: 18 Drives: 14 Nissan 370Z PW A7 Rep Power: 11	I was driving like an old lady for the first 1200 miles, I thought only the first 1200 miles are the break in period? BTW, the computer says the average speed is like 16 mph, too slow? kenchan likes this.

03-13-2014, 01:58 PM	#2 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141520	i would try driving on hwy at 50-55mph constant for 10-20miles to see how the mpg is affected. if it still doesnt improve i would say take your car to the dealer. chances are, you're a tad heavy foot and just enjoying your new car while the car is breaking in.

03-13-2014, 02:07 PM	#9 (permalink)
roy'sz A True Z Fanatic Join Date: Aug 2011 Location: palmdale, ca Posts: 1,299 Drives: 2010 nissan 370z Rep Power: 15	depends on how long you are idling for at stoplights, traffic, how heavy your foot is, your shifting patter as far as how long you linger in a gear at medium revs. That is actually how you should be calculating your mpg. I drove from palmdale, ca to las vegas, nv in Jan. I filled up and drove up hwy14 to the 15. I avg'd 28mpg up and 26.5 on the way back. Had I not drove around in Vegas I would have gotten approx 520miles on a tank and had almost half a tank left. Hope this puts it into perspective. __________________ https://www.youtube.com/watch?v=RtvG...data_playerARK HFC'S-ARK Grip-Stillen G3-M370-UPREV-Kinetix upper control arm-WC Latheworks-Stage2 Bad@$$ Driver(318whp/268tq)-

03-13-2014, 02:10 PM	#11 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	It's probably a combination of things. You're driving in low gears at medium rpm, lots of stop and go, a new car breaking in, etc. Make sure your tires are inflated enough. Try shifting under 3k rpm. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

03-13-2014, 02:19 PM	#12 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	This thread is a downer. Here I am just sitting here waiting for snow to melt so I can get the best 6mpg of my life while I try and get my fix before the next snowfall. shoulda bought a prius lol. It does seem very low for stock though, something is not right. Can you hear any exhaust leaks perhaps? kenchan, Mt Tam I am, Mrmaasta and 1 others like this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

03-13-2014, 02:24 PM	#15 (permalink)
BigT Enthusiast Member Join Date: Jan 2012 Location: NJ Posts: 469 Drives: 98 2g DSM Rep Power: 13	Sounds like you're driving in NYC or any other big city. Frequent stop and go along with low speeds = terrible gas mileage. __________________ 2014 Jeep GC 1998 Talon TSI awd 2011 Z Sport - SOLD

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