Well.....I chickened out when the last bar went off and drove 2 miles to the gas station.
Here's some numbers for gas tank calculations or PZEV civics that I've figured out so far:
tank capacity according to manual: 11.9 us gallons.

I've had my car for 4 months and so far filling up when I got to 2 bars was:
10.4, 10.15, 10.09, & 9.95- leaving at least 1.5 gallons to use (keeping .4 gallons in reserve for my sanity)
therefore, divided equally- last 2 bars are .75 gallon each, right?
So I had gone 593 miles when the last bar went off. Of course I had reset the tank meter by accident, and didn't know I was quite that close- I thought I had about another 15 to go. So I bought gas and the fillup was 10.56 (to automatic shutoff).
that leaves approximately another whole gallon in the tank when the last bar goes off.
I don't know how definite that is, since it's based on computer calculations of fuel consumption and mileage.

I also cheated a little- I very carefully measured .5 gallon gas at home the day before and added it to my tank- I was concerned about running out and damaging the catalytic converter etc. (not to mention the walk from where-ever; I have run out of gas before and had to walk).
so totals for the trip were: 11.06 gallons/595 miles/53.79 mpg
which is still my highest tank average so far, so I'm happy. next time I'll definitely beat the 600. Hey- give me a break! I'm a newbie!

Myles- where're you at on your try?

KLC
2005 HCH CVT 'Verdigeek'

You have the whole summer ahead of you. It should be no problem. for sanity you should just get a 1 gal container to keep in the trunk the last couple days of your future atempts.

My hydroponics experiment

You ever notice how hard it is to lip read cartoon characters?
"Crazy is what the sane call Delta Flyer"

Confused about title??

You are going for 600 mile tank correct?

Why include AT-PZEV designation?

Probably because the AT-PZEV has the smaller gas tank (11.8), hence the smaller target miles (600).

Ahhh. Surely you are correct.