Quote Originally Posted by blank cd
yes. Those nozzles should be on all stage2 systems, which are at all BPs and QTs. Keep in mind when it cuts off, 99.9% of the time your tank is full, so when you keep clickin on the handle when it stops, gas is gettin sucked down that little valve and the station is reaping the benifits. It kills me when i see people doin that
Quote Originally Posted by Schugg
haha no need to flip out, it may do that, but seriously, the gas station is not getting and benifits out of it worth worrying about. it suck up like .015 cents of gas......so

i guess when your 80 years old and have done that your whole life you may have lost a few hundred dollars. if that
Quote Originally Posted by xPhantomSilviax
Is it bad that I "top off" my tank not because I want a really genuinely super full tank, but because I'm lazy and am rounding it to the next dollar so it's easier for me to balance my checkbook?

And while some of the gas may be going up that thing, is all of it? Cause I know in my quest to have $27 instead of $26.43, I have overflowed many a time. >_>
It doesn't suck anything up, it's not a vacuum, and it doesn't magically work against the worlds gravity...ZERO fuel is lost (unless you fill it past your overfill drain anyways).

It merely measures the air pressure that is being forced out of your tank as you fill it with fuel. You have the choice of two things in your tank, gas or air, the more fuel you put in it the more air that is being pushed out. When you fill your tank there is no more air to be pushed out therefore it knows when to stop because that air pressure is now gone.