2014 370z Sport only 11 mpg

Endlessnoob · 03-13-2014, 02:25 PM

Quote:

Originally Posted by Chuck33079

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

So whats that noise? It is somewhere under the chassis I think. And how does an exhaust leak sound like?

ParkStr8 · 03-13-2014, 02:25 PM

I've had my roadster for 9 months now - and only average 11.9. But I sit in LA traffic and it takes me 30-60 minutes to go 6-7 miles. So I attribute it to that. My 2012 EX35 with 20's, my 2011 G37S Coupe with 19's, my 2011 Maxima with 19's, and my 2008 G35S sedan with 19's all did about the same. (Yes - Ive had a lot of Nissan cars lately).

Its the VQ engine and that fact that it's stop and go. But it's a great engine and when I do get on the freeway I get around 25-29 at 70.

The tick tick is normal for the VQ - should be very very faint. I've had it on all of them. Used to drive me nuts but I just gave up on thinking it was a problem.

Chuck33079 · 03-13-2014, 02:27 PM

Quote:

Originally Posted by Endlessnoob

So whats that noise? It is somewhere under the chassis I think. And how does an exhaust leak sound like?

That's just the noises a hot car makes when it's cooling down. In order for an exhaust leak to be happening, the car has to be running.

KN21283 · 03-13-2014, 02:29 PM

Case of lead foot

Endlessnoob · 03-13-2014, 02:29 PM

Quote:

Originally Posted by BigT

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

I'm in Houston, I drive like 4 miles from home to work and another 4 miles back every day...speed limit 30-35 mph...5 stops for 1 way...

manufacture list 18mpg, if im getting like 15-16, i wont complain...but 11...makes me want to know if something is wrong...

Chuck33079 · 03-13-2014, 02:31 PM

Quote:

Originally Posted by Endlessnoob

I'm in Houston, I drive like 4 miles from home to work and another 4 miles back every day...speed limit 30-35 mph...5 stops for 1 way...

manufacture list 18mpg, if im getting like 15-16, i wont complain...but 11...makes me want to know if something is wrong...

Is the car even getting up to temp? When it's cold the ECU adds fuel.

kenchan · 03-13-2014, 02:31 PM

Quote:

Originally Posted by Endlessnoob

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

thats normal, expecially on new car. your mid pipe and or heat shield is making that noise from expansion contraction.

jaedub · 03-13-2014, 02:31 PM

I personally believe shifting at 3k~4k is a bit high. And I'm willing to bet your foot is heavy on the pedal. You should shift under 3k with easier acceleration and throttle.

kenchan · 03-13-2014, 02:32 PM

Quote:

Originally Posted by Endlessnoob

I'm in Houston, I drive like 4 miles from home to work and another 4 miles back every day...speed limit 30-35 mph...5 stops for 1 way...

manufacture list 18mpg, if im getting like 15-16, i wont complain...but 11...makes me want to know if something is wrong...

there you go. that's too short and speed too low.

take it out on a stretch on a weekend. you're going to prematurely kill the battery too unless you put a tender on it.
like my first post, drive 10-15miles at hwy speeds and see where you mpg goes. GL!

Chuck33079 · 03-13-2014, 02:34 PM

New car, 4 mile commute, the car never getting out of cold start enrichment, shifting at 4k. Honestly, 11 sounds about right.

Endlessnoob · 03-13-2014, 02:34 PM

Quote:

Originally Posted by jaedub

I personally believe shifting at 3k~4k is a bit high. And I'm willing to bet your foot is heavy on the pedal. You should shift under 3k with easier acceleration and throttle.

I have done that for the first 1200 miles. if i shift under 3k, a corolla runs faster than me ...

Endlessnoob · 03-13-2014, 02:37 PM

Quote:

Originally Posted by kenchan

there you go. that's too short and speed too low.

take it out on a stretch on a weekend. you're going to prematurely kill the battery too unless you put a tender on it.
like my first post, drive 10-15miles at hwy speeds and see where you mpg goes. GL!

Thanks~~I will give it a try

kenchan · 03-13-2014, 02:37 PM

Quote:

Originally Posted by Endlessnoob

I have done that for the first 1200 miles. if i shift under 3k, a corolla runs faster than me ...

that's cause them corolla's are fast!

Endlessnoob · 03-13-2014, 02:39 PM

Quote:

Originally Posted by Chuck33079

New car, 4 mile commute, the car never getting out of cold start enrichment, shifting at 4k. Honestly, 11 sounds about right.

My friend is driving a new infinity qx70, we work at the same place and live in the same community, he is getting around 15mpg...><....same engine, but his car is way heavier than mine, why......

Chuck33079 · 03-13-2014, 02:41 PM

Quote:

Originally Posted by Endlessnoob

My friend is driving a new infinity qx70, we work at the same place and live in the same community, he is getting around 15mpg...><....same engine, but his car is way heavier than mine, why......

Why are you comparing two different vehicles? Are they geared the same? Are they tuned the same? Does he shift at 4k rpm?

03-13-2014, 02:34 PM	#25 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	New car, 4 mile commute, the car never getting out of cold start enrichment, shifting at 4k. Honestly, 11 sounds about right. Ghostvette likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

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03-13-2014, 02:25 PM	#17 (permalink)
ParkStr8 Enthusiast Member Join Date: Mar 2009 Location: Dallas, Tx Posts: 361 Drives: 2015 370z Sport Tech Rep Power: 16	I've had my roadster for 9 months now - and only average 11.9. But I sit in LA traffic and it takes me 30-60 minutes to go 6-7 miles. So I attribute it to that. My 2012 EX35 with 20's, my 2011 G37S Coupe with 19's, my 2011 Maxima with 19's, and my 2008 G35S sedan with 19's all did about the same. (Yes - Ive had a lot of Nissan cars lately). Its the VQ engine and that fact that it's stop and go. But it's a great engine and when I do get on the freeway I get around 25-29 at 70. The tick tick is normal for the VQ - should be very very faint. I've had it on all of them. Used to drive me nuts but I just gave up on thinking it was a problem.

03-13-2014, 02:29 PM	#19 (permalink)
KN21283 Enthusiast Member Join Date: Dec 2011 Location: Nyc Posts: 312 Drives: Pw Rep Power: 13	Case of lead foot

03-13-2014, 02:31 PM	#23 (permalink)
jaedub Track Member Join Date: Aug 2010 Location: Los Angeles Posts: 906 Drives: 2010 Black 370Z MT Rep Power: 304	I personally believe shifting at 3k~4k is a bit high. And I'm willing to bet your foot is heavy on the pedal. You should shift under 3k with easier acceleration and throttle.