zeedriver

So I decided to test and see how far I can go. Since I knew I could go at least 340 miles with 15 gallons, I did some simple math and figured I could go at least another 2 days with my gauge at E (it didn't even move). I ended up going 443.5 miles on 18.468 gallons and $77.00 and some change later, it was filled up and it was all freeway driving. I averaged 24MPG. my MPG average in the gauge said 25, but obviously it is wrong. What kind of MPG is everybody getting?

F2CMaDMaXX

iTrader: (2)

That's pretty accurate, the 350 tank is hard to accurately fill, hence calculating the usage isn't fully accurate.
There is also the fact the computer (I believe) bases usage off the wideband and the level gauges. My accuracy has gone off a little since my gauge got worse.

Cleaning soon.

Dude1312

iTrader: (2)

i just bought my 08 z about a month ago filled it up today because it said it was empty put in about 11 gallons said it was gull checked the guage says 3/4 think im going to try this and let you guys know my results

vorttam

Same boat here. Fill up around 10-13 gallons, and get 250 miles to the tank. Don't know how you get 400+ to a tank " mainly highway driving?" I drive mainly city with little highway driving. I dont know, would seem I should get more. I also understand a lot has to do with your right foot. Which I try to keep the rpm below 3k. Until some tard cuts me off.

350ZNISMO673

I got 400+ on my last tank, but I was driving all hwy between STL and OH

F2CMaDMaXX

iTrader: (2)

Mine still messes around a little bit once it goes below a quarter tank, but it reads great everywhere else now, even below a quarter tank, it still reads fairly well.

I empty the tank with about 3 gallons let in it.

I DTW I

When my gas light turns on, I fill up and only 7 gallons goes in before the pump shuts off and the gauge acts like it's mostly full.

Based on reading all these threads on here, there's a good chance there's another 11 or so gallons always in there? I'm about to start autocross and would rather not have all that weight always in there so I'd like to confirm it.

Should I wait til the gas light comes on and keep driving? (and have a gallon in my trunk) or is there an easier way to prove if I still have gas in there?

DarkCreep

iTrader: (1)

When I fill up my needle goes a few millimeters past the full level but its inaccurate once I start driving.

Sometimes it goes to half a tank fast, sometimes it takes a while. I usually average 23-24 MPG though. I really want that 26 though!!!

CameronZ33

Just about every time I fill up the pump cuts off way early. Today I went to fill up and I was on E. It put about 2 gallons in and then shut off and I had to keep squeezing the handle to keep the gas flowing and it would still periodically shut off. Can anyone help me understand this? It must be some sort of filler cutoff valve issue.

bjr

I've had all the problems in these posts and was researching it again but this time as it pertains to ANY car. Look for yourself, some of our gas tank problems are common autotive issues.
Has anyone here considered even though we do have a couple of unique design features and there is a TSB on one issue that the entire EVAP system needs to probably be investigated in detail going through the troubleshooting guidelines in the service manual? I'm wondering if I would find a plugged charcoal canister or any other common problems listed online or in the service manual.
That was my next goal but haven't had time. For the last 6 months I haven't been able to get a full tank again but it recently went away. I seem to have the below 1/2 tank the gauge doesn't work problem too most of the time.
Having both of those problems at the same time finally caused me to run out of gas one time this year. I was 4 miles away from the next exit. If I knew it would take 2 hours to get rescued I would have started walking to buy my own gas and walked back!

oldschool350z

iTrader: (1)

I have this issue and would love to have a fix.

I can only fill up 10-12 gallons and after 1/4th of a tank it's very inaccurate.