Nissan 370Z Forum - Fuel Gauge Accuracy, Reserve Amount?

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Nissan 370Z Forum (http://www.the370z.com/)

- Nissan 370Z General Discussions (http://www.the370z.com/nissan-370z-general-discussions/)

- - Fuel Gauge Accuracy, Reserve Amount? (http://www.the370z.com/nissan-370z-general-discussions/90899-fuel-gauge-accuracy-reserve-amount.html)

theDreamer

06-05-2014 12:35 PM

Quote:

Originally Posted by houkouonchi (Post 2847754)

Its been widely reported that the gauge is often not all that accurate on the 370Z and often times you have quite a bit more than it says. That being said its actually way way worse on my GT-R. I have had the DTE go down to 0 (and gas light on) and filled up and only put 12 gallons in! Its got a bigger tank than the 370Z being at 19.5 gallons. The issue is *much* worse on the GT-R. I would say 1.5-2 gallons is typical to have in the reserve when DTE goes to -- on the 370z.

370z fuel tank is 19 gallons so the GT-R is only .5 bigger.
Honestly the fuel tank takes into a lot of factors but it is terrible all around. I can sit in the top 2-3 dots for a few days and then in the next 24 hours be well below half a tank with the same driving.

Mt Tam I am

06-05-2014 12:42 PM

Quote:

Originally Posted by sandersd (Post 2847326)

New 2014 Z owner (2 weeks and loving it!) Long story short, I drove until the gauge read 20 miles till empty, then it changed to flashing --- which worried me as I still had about 30 minutes to home. When I filled up the tank only took 16.6 gallons leaving 2.4 gallons in reserve.

This doesn't really concern me but it is useful to know exactly how much further I could have driven if I were in a situation that demanded it. Is this a typical quantity to have left in reserve after the gauge begins to flash --- ?

My first encounter with the estimated fuel gauge involved the little lady demanding to know why I took her out on a country road without a proper fuel load. As the gauge kept spelling out how many miles were left 50 miles then a mile later 41 miles then another mile 29 left. It fell right off then went to bars. The entire time I'm being ridiculed. When we got to town and found gas I too only took about 17 gallons as well.

Fuel starvation is more likely to occur down at the dregs.

Dan33900

06-05-2014 01:08 PM

I use my car to drive 130 miles round trip daily. I get the flashing light each tank at 450 miles and almost always put in 16.5 gallons per fill up(3 times every two weeks). this leaves 2.5 gallons in reserve. I average 27.2 mpg. I love commuting in this car.

sandersd

06-05-2014 02:26 PM

Good info. Thanks for all the replies!

BTW it's a shame ATL doesn't build a replacement tank that solves the problem, even if it held less. At 2k, you'd have to really want one - bad...

srbrubak

06-05-2014 09:06 PM

The lowest my dots got was half way between 1/4 and 1/2. I have never gotten below a 1/4 of a tank. I like to keep my Z filled up.

onzedge

06-08-2014 07:42 AM

Quote:

Originally Posted by houkouonchi (Post 2847757)

This is definitely an issue on the 370z. I Have had fuel starvation all the way up to a half a tank of gas. It will recover if it has that much gas in it but it almost screwed me once as it stopped accelerating for a few seconds while I was trying to merge and the lane was disappearing.

I have had it not recover several times if I am under 1/4 tank of gas but I generally take the turns way softer due to the times I have been stranded due to this issue (happened 3 or 4 times now).

:icon18:

confucius

06-08-2014 10:07 PM

Quote:

Originally Posted by Dan33900 (Post 2847793)

I'm envious of your mileage. I just hit 30,k after owning the Z for 14 months. My personal best has been during a long highway sprint when one fill came in at 25.3, generally averaging in the low 24 range. (MPH could be a factor :icon17:)

As for the actual OP thread topic I've never been able to get in more than 16 3/4 gallons at a stop. Something between common sense and fear make me fill when the bars blink for very long. Those last three dots are a bad joke.

njobe89

06-09-2014 06:40 AM

Quote:

Originally Posted by Dan33900 (Post 2847793)

how are you averaging 27.2???

BlkNismo

06-09-2014 11:41 AM

So at 1 dot remaining, it takes around 16.5 gallons to fill.

Do we really have 2.5 gallons reserve?

I'd imagine we have 1 or 2 gallons that are unusabe by the pump. Any thoughts?

djc119

06-09-2014 05:17 PM

Quote:

Originally Posted by njobe89 (Post 2851670)

how are you averaging 27.2???

Probably low RPM's and flat roads with few stops and high speed limits.

And not very :driving:

TexasChuck

06-09-2014 06:38 PM

Gas Gauge

My new 2014 definitely reads different than my 2012. The '12, I could go 70 miles before the lighted gauge started dropping. The '14, it starts dropping much sooner, like 40 miles. The first mileage check was 26 mpg, the second was 22 mpg highway. Really got me concerned. This is with mild driving, still in the break in period. ??? 500 miles.
Chuck

onzedge

06-09-2014 06:41 PM

Quote:

Originally Posted by TexasChuck (Post 2852413)

Hmmm. That mileage does not sound so good. Are you basing this on what the computer says or my comparing actual gallons and miles?

njobe89

06-10-2014 05:40 AM

Quote:

Originally Posted by djc119 (Post 2852306)

Probably low RPM's and flat roads with few stops and high speed limits.

And not very :driving:

i try to keep my rpms 2-3k range but then again seems every time i get a chance to step on it a little bit i take advantage of it :happydance:

Nevada3

06-26-2014 12:38 AM

Below a half tank it's all about how you drive your Z. Doughnuts to the left are fine, doughnuts to the right are a problem.

onzedge

07-05-2014 04:20 PM

Quote:

Originally Posted by houkouonchi (Post 2847757)

:icon18: Awesome.

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