Filling the tank with repeatabilty

[j12piprius]

Originally Posted by wagonman76

Then what I do is always pump the same speed. Which is about 0.1 gallon per second, I just imagine a clock ticking in my head as I watch the gallons readout. Then when it kicks off, I pump about half that speed till it kicks off again, and it usually does in about half a gallon. Then I call it good.

That's very helpful. Thanks

Originally Posted by jim-frank

Temperature seems to make a notable difference, too. I try to fill at the same time (preferably when it's cool outside) so that doesn't make so much difference.

The temperature in the ground probably wouldn't vary that much, except it's under concrete, which can make a big difference. The other thing is, how long ago was the gas put into the ground from the truck, as the gas could have been a much higher temperature in the truck. So it seems to me that the the early morning is the best time to get gas, after an overcast the previous day, and as long as possible since the ground was filled from the truck.

[Rick323]

I pump fuel until I can actually see fuel, it takes a while but is very consistent.

[Kodak]

I used to be somewhat serious about using the same pump to the point that I would actually wait for it to be free if someone was there.

One time I got to the station late at night and one other car was at the pump I prefer. So I parked, bought something from the convenient store, and got back in my vehicle. As soon as I started up, somebody else pulled into the station at whatever obscure hour of the night it was...and went to the same pump.

These days I'm less particular. I figured that if the goal is to use less fuel, then idling or restarting the engine to get a certain pump - while perhaps good for calculations - isn't worth it. If I can get the same pump I will, but I'll take whatever is free and let the average work itself out.

[LUVMY02CREW]

Originally Posted by Rick323

I pump fuel until I can actually see fuel, it takes a while but is very consistent.

That's what I do also. It does take a while, but after the first click, I can usually pack in another 1-1.5 gallons. Seeing the gas assures me, in my mind, that I'm going to get pretty consistent calculations.

I only fill up on the way to or from work so I know that the fuel in the neck will get used up. So I don't worry about the rubber neck having gas sit in it too awful long and possibly damaging it in the very long run.

[barchetta]

Originally Posted by LUVMY02CREW

That's what I do also. It does take a while, but after the first click, I can usually pack in another 1-1.5 gallons. Seeing the gas assures me, in my mind, that I'm going to get pretty consistent calculations.

I only fill up on the way to or from work so I know that the fuel in the neck will get used up. So I don't worry about the rubber neck having gas sit in it too awful long and possibly damaging it in the very long run.

Why do I see signs saying not to do this? Is there an overfill tube? And where does it go? I've been thinking about changing to this method as well.

[cfguy2000]

Filling up past the first auto-click off is just a waste of your money. The auto-shutoff valve sucks the excess gas back into the pump thinking that it won't fit in your gas tank. I was a gas station attendant for several years and I have had classes on this.

[barchetta]

Originally Posted by cfguy2000

Filling up past the first auto-click off is just a waste of your money. The auto-shutoff valve sucks the excess gas back into the pump thinking that it won't fit in your gas tank. I was a gas station attendant for several years and I have had classes on this.

If this is the case how can he see the fuel?

[Sularus]

it really isn't recommended to fill until you see fuel. It is possible for fuel to get into the EVAP system. If it gets into the charcol canister you will have replace it and that can get expensive. Find a method you feel is consitent and use it every time. I started using wagonman76's method and it has worked fairly well for me. By restricting how much fuel is going through it is a little easier to get more fuel in before the back pressure kick.

J

[j12piprius]

Originally Posted by cfguy2000

Filling up past the first auto-click off is just a waste of your money. The auto-shutoff valve sucks the excess gas back into the pump thinking that it won't fit in your gas tank. I was a gas station attendant for several years and I have had classes on this.

Can you provide more information about that?

[gone-ot]

...read for yourself:

Pat Goss: Ask The Expert

...here:

http://www.sbcapcd.org/edu/dtofactsheet.pdf

...here:

http://action.publicbroadcasting.net/cartalk/posts/list/2143473.page

...here:

http://www.mtrinc.com/gasoline_vapor_recovery.html

...and, here:

http://www.epa.gov/ttn/naaqs/ozone/c...ensing(v1).pdf