Last few fuel dots?!?

122554 · 04-30-2013, 04:17 PM

Quote:

Originally Posted by Bucketlist2012

My MPG ? Geez I never look because I don't care....I bought it to go fast...

^^^^^ this!

Being out of the country so much, I really don't give a damn. Filled it up in January, and again last week so far this year!

JARblue · 04-30-2013, 04:19 PM

Quote:

Originally Posted by CDepp

I know JAR. I'm just stating that letting your tank go to the last few dots is not going to give you any more information about the capacity to use a tank of gas than filling up after using 1 gallon. The math and physics don't change over the life of the tank, so you can just as accurately gauge how far you can go from 1 mile from fill-up just as easily as waiting until you've used 3/4 of a tank, regardless of how much gas you have left.

Again, not a reason to run your tank low. But, if it's your preference, go all about it.

I'm just a logic guy, so if you say you have a rock that keeps away tigers, and justification is that you carry the rock and never see a tiger, I might say something. Running low on your tank provides no more information about how far your car can go as filling up every few miles.

Like you say, it's all in how well you drove the car, or intend to drive the car from filling up.

Cheers!

I understand exactly where you're coming from. Now that you have removed all logic from my argument, going forward, I will be emptying the fuel tank just to show you guys that it doesn't hurt anything

JARblue · 04-30-2013, 04:22 PM

Oh and to be clear... I don't care about my mpgs. I like to know how many miles I get per tank so I don't have to stop for gas if it's inconvenient. More than once the Z has told me I have --- Miles Remaining when I know I can get another 50 miles out of the tank (that's a couple of days worth of my regular commute).

zeeder · 04-30-2013, 05:37 PM

I'm with you on wanting to know what my mpg is on every tank so I know how many miles I can travel. That said, I always thought Z's had a 20 gallon tank so I'm glad I read this thread! I'm still breaking the car in so while I haven't done much spirited driving yet I have been varying the gear and RPMs frequently so I averaged around 18.6 MPG. In my '07 350Z I would generally average between 16MPG and 20MPG depending on how much highway and how spirited my driving was that tank. I assume that the 370Z will be similar.

CDepp · 04-30-2013, 07:34 PM

Quote:

Originally Posted by JARblue

I understand exactly where you're coming from. Now that you have removed all logic from my argument, going forward, I will be emptying the fuel tank just to show you guys that it doesn't hurt anything

CDepp · 04-30-2013, 07:42 PM

Quote:

Originally Posted by CDepp

I'm an @ss sometimes. My bad

JARblue · 04-30-2013, 07:43 PM

Quote:

Originally Posted by CDepp

I'm an @ss sometimes. My bad

no apologies necessary dude

I can dish it out and I can take it

Bucketlist2012 · 04-30-2013, 07:51 PM

Quote:

Originally Posted by CDepp

I'm an @ss sometimes. My bad

Welcome to the Club....I am thinking of starting a A$$hole anonymous club....

Wabbyyy · 05-01-2013, 10:17 PM

I never let my car get below a quarter of a tank. Play it safe

Ubetit · 05-02-2013, 07:34 AM

Quote:

Originally Posted by UNKNOWN_370

If anyone is getting over 20mpg's combined? You wasted money on a sports car

Thread title advice to the general public... Fill at Five. You'll destroy your fuel pump early causing another problem and blaming Nissan for it

I fill at 2 dots and my last 5 tanks have all been over 20.6 MPG.

Coon-azz · 05-02-2013, 07:47 AM

Quote:

Originally Posted by OldGuy

Just play it safe and fill up when you fall below half. One less thing to worry about with this car.

Agreed...issue resolved.

JARblue · 05-02-2013, 08:24 AM

Quote:

Originally Posted by Coon-azz

Agreed...issue resolved.

Other than fuel starvation potential, I'm still confused as to what is the actual issue. If I'm driving where I think FS might be a problem (i.e. on a track), then I will adjust my fill up habits accordingly. So far, all I've heard, is that the life of the fuel pump might be shortened by waiting so long to fill up with no evidence why or how that might happen. I will certainly post if I ever have a problem, but I haven't had a problem yet in 2+ years of DD.

No response needed unless you can explain why the fuel pump would fail because I don't put gas in the car soon enough with a 'running out of gas' scenario excluded from the equation. I'm happy for everyone to do whatever they want when they fill up their cars, but it just seems like there are a lot of people saying that the Z should be filled up at 5 dots or half a tank or something without a valid reason why.

SouthArk370Z · 05-02-2013, 09:51 AM

Quote:

Originally Posted by JARblue

... No response needed unless you can explain why the fuel pump would fail because I don't put gas in the car soon enough with a 'running out of gas' scenario excluded from the equation. ...

The two theories that I have seen/heard are: lack of general cooling and lack of seal lubrication. Both caused by loss of flow for extended periods while the pump motor is running.

Most common reasons for loss of flow seems to be clogged inlet filter and corrosion/erosion caused by water and/or alcohol. I didn't dig very deep, but it appears that lack of fuel only becomes a problem if it lasts for more than a few seconds. Google "fuel pump failure" for more info.

JARblue · 05-02-2013, 10:04 AM

lol thanks SouthArk

Always with the technical answer

I understand how and why a fuel pump can fail but not how it relates to my fuel fill up habits. Running out of fuel seems to be the most likely reason for failure, but otherwise, it's likely going to be a event that happens randomly and unrelated to the fuel level at the time of failure. I hope that makes sense.

Sorry, I'll try not to beat this dead horse any more

kenchan · 05-02-2013, 11:08 AM

04-30-2013, 04:22 PM	#63 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	Oh and to be clear... I don't care about my mpgs. I like to know how many miles I get per tank so I don't have to stop for gas if it's inconvenient. More than once the Z has told me I have --- Miles Remaining when I know I can get another 50 miles out of the tank (that's a couple of days worth of my regular commute). __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

05-01-2013, 10:17 PM	#69 (permalink)
Wabbyyy Base Member Join Date: Feb 2013 Location: New Jersey Age: 31 Posts: 126 Drives: 2009 370z Rep Power: 12	I never let my car get below a quarter of a tank. Play it safe __________________ 2009 370z.

05-02-2013, 10:04 AM	#74 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	lol thanks SouthArk Always with the technical answer I understand how and why a fuel pump can fail but not how it relates to my fuel fill up habits. Running out of fuel seems to be the most likely reason for failure, but otherwise, it's likely going to be a event that happens randomly and unrelated to the fuel level at the time of failure. I hope that makes sense. Sorry, I'll try not to beat this dead horse any more __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

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04-30-2013, 05:37 PM	#64 (permalink)
zeeder Enthusiast Member Join Date: Jun 2011 Location: Columbia, MO Age: 47 Posts: 460 Drives: ‘13 370Z ST 6M Rep Power: 3428	I'm with you on wanting to know what my mpg is on every tank so I know how many miles I can travel. That said, I always thought Z's had a 20 gallon tank so I'm glad I read this thread! I'm still breaking the car in so while I haven't done much spirited driving yet I have been varying the gear and RPMs frequently so I averaged around 18.6 MPG. In my '07 350Z I would generally average between 16MPG and 20MPG depending on how much highway and how spirited my driving was that tank. I assume that the 370Z will be similar.

05-02-2013, 11:08 AM	#75 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521