Last few fuel dots?!?

Wiggins3377

Damn. Looks like I really push it. 18.82 gallons in January.
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JARblue

Now that's impressive!

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wdkwang

how are you getting that kind of mpg? i average 16.5mpg

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wdkwang

u sir have to tell us what kind of voodoo magic spell you've got to be getting those numbers

i just got the gas cubby app after i saw your post. i've avg 16.7mpg over the 28k miles i've driven the car. 16.6mpg, as you can see, over the last 3 fill-ups recently.

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UNKNOWN_370

Same here. My gauge says 16.7mpg. I think i see 13/14mpg city and 19 highway.
If anyone is getting over 20mpg's combined? You wasted money on a sports car cuz that poor baby sees no action.

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.

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JARblue

My wife got 21 mpg for the first 18 months commuting about 15-20 miles per day all highway (with me romping on it during the weekends). Since Sept 2012, I have knocked that lifetime avg down to 18.5

I guess I'll be ready when it happens, but I still don't understand how the fuel pump is affected by how much gas I have in the car (I run it to '--- miles left' pretty much every tank). And if I have to leave several gallons of gas in the car to keep the fuel pump from failing, how is that not a poor design on Nissan's part and ergo their fault? You're damn right if it fails within my warranty period I'm going to blame them. I should be able to drive my car until it's almost out of gas, and almost is not 'I could have driven another 100 miles'

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UNKNOWN_370

Hey knock yourself out. Just advice to save you guys trouble. Take it or leave it. The fuel pump potential issue is on ALL cars, not just nissan.

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JARblue

I'm just not worried about it... if it happens to me, maybe I'll change my tune then. I can handle a little inconvenience. For what it's worth, I've never had the problem with any of my DDs (88 Pathfinder I drove 120K of the 220K total miles, 95 Explorer Sport 120K of 160K, 99 CR-V 180K of 250K, 2000 Sentra 10K of 50K - grandpa gave me the Sentra which I traded for the Z within 6 months ). I drive the car until virtually empty so I know how many miles I can get on the tank - I never trust the car's fuel gauges, only the mileage counter. It's worked for me so far

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SouthArk370Z

It's not a big problem unless you empty the tank and run the pump dry. Very few ppl do that.

It may slightly reduce the life of the pump to run with a very low fuel level, but, in the end, it really doesn't amount to a hill of beans.

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CDepp

You're silly. That makes no sense as a reason. LOL. You can do the same if you constantly fill up after driving only a couple hours and fill up again, rinse/repeat.


ex:
running to empty tank-
18.8 gallons used
396.87 miles driven
21.11 mpg (21.11010)
19.1ga. capacity tank
tank can go 403.2~ miles

filling up every couple hours-
3.65 gallons used
77.05 miles driven
21.11 mpg (21.10958)
19.1ga. capacity tank
tank can go 403.2~ miles

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wdkwang

Fuel pumps, by design, are located in the tank and the fuel is the only thing that's cooling it (like a radiator) from overheating and burning out. That's how fuel pumps are in general. If your running on fumes, the fuel pump will be running hotter = shorter life. I don't know how Nissan quality is but I ran my old '92 Integra till the E light was on all the time. No problems. I personally try to fill when it's down to 2-3 lights

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JARblue

Thank you for the explanation. I was aware that the fuel helps cool the pump, but is there ever a point where the fuel pump has zero fuel cooling it? If not, I would think that while a smaller volume of fuel heats up quicker, a full tank could get to the same temperature eventually on a long trip. So it would make sense to me that it could be affected more by driving habits in conjunction with fuel filling habits than just fuel filling habits by themselves.

Sorry for jacking the thread...

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Ubetit

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