pumping?

[barbaram]

I switched gas stations and my last 4 tank calculated a bit over 50 MPG. Here in NJ we do NOT pump our own gas- and the attendant would just cut of the pump when it stopped automatically.

however the other night I stopped at another station an he forced more gas in after the pump hit automatic stop .. calculated mileage only 36 MPG!!!!!

wondering how much gas can be added after the pump hits the first auto stop........temp was in the 60's

[brandon]

You shouldn't add any after the pump kicks off.

http://www.epa.gov/donttopoff/

[qbee42]

There are many, many posts about this. It all depends on temperature, lot angle, phase of the moon, and sacrificing small animals. There is no set answer, but you can force a significant amount in after the click; not that you should. Don't worry about mpg based on single tank calculations. Use the MFD, or running calculations based on many tanks.

Tom

[eagle33199]

It all comes down to the pump being used... Some pumps click off early (meaning you can pump a lot more in), others click off later (you can pump little to nothing in), and yet others have been known to click off late (meaning over flow), however those generally are fixed/replaced.

In generally, you shouldn't top off (hard to do if you legally can't be the one pumping...). Every time gas gets burped out of the bladder, you not only release more polution than the car will on the entire tank of gas, but you risk fouoling up some systems that are rather expensive to replace... it wouldn't be a bad idea to pull in and just say "don't top off please".

[tomdeimos]

<div class='quotetop'>QUOTE(eagle33199 @ Sep 8 2006, 09:21 AM) [snapback]316262[/snapback]</div>

It all comes down to the pump being used... Some pumps click off early (meaning you can pump a lot more in), others click off later (you can pump little to nothing in), and yet others have been known to click off late (meaning over flow), however those generally are fixed/replaced.

In generally, you shouldn't top off (hard to do if you legally can't be the one pumping...). Every time gas gets burped out of the bladder, you not only release more polution than the car will on the entire tank of gas, but you risk fouoling up some systems that are rather expensive to replace... it wouldn't be a bad idea to pull in and just say "don't top off please".
[/b]

Easy to do. Just get them to fill a gas can. Then pour it in yourself to top off. I used to have to do it regularly with my diesel when I had to mix in gasoline and or kerosene and the gas station wouldn't do it, back in the days before they had auto-diesel fuel.

[barbaram]

It was late and before I could stop the guy , he was topping it off- next time I'll have to get out and make sure he doesn't do it!

[Proco]

<div class='quotetop'>QUOTE(barbaram @ Sep 8 2006, 04:38 AM) [snapback]316224[/snapback]</div>

I switched gas stations and my last 4 tank calculated a bit over 50 MPG. Here in NJ we do NOT pump our own gas- and the attendant would just cut of the pump when it stopped automatically.

however the other night I stopped at another station an he forced more gas in after the pump hit automatic stop .. calculated mileage only 36 MPG!!!!!
[/b]

Do you remember what your MFD was saying? He shouldn't have added that much. The attendants at the station I go to will take it up to the next 25 or 50 cent increment, adding no more than 1/4 gallon.

<div class='quotetop'>QUOTE(brandon @ Sep 8 2006, 08:44 AM) [snapback]316248[/snapback]</div>

You shouldn't add any after the pump kicks off.
[/b]

It wasn't her choice. We're not allowed to pump our own gas in NJ. The attendant did it on his own.

[jburns]

<div class='quotetop'>QUOTE(barbaram @ Sep 8 2006, 04:38 AM) [snapback]316224[/snapback]</div>

I switched gas stations and my last 4 tank calculated a bit over 50 MPG. Here in NJ we do NOT pump our own gas- and the attendant would just cut of the pump when it stopped automatically.

however the other night I stopped at another station an he forced more gas in after the pump hit automatic stop .. calculated mileage only 36 MPG!!!!!

wondering how much gas can be added after the pump hits the first auto stop........temp was in the 60's
[/b]

Don't worry you will get those miles back. At the next fill-up if you stop pumping at the first auto stop I'll bet you will be above 55 mpg for that tank. Of course all this is false since your Prius is just merrily sipping the gas at the same rate it always does and probably laughing at the strange ways of humans.

[naterprius]

Wow... if I lived in New Jersey, every time I bought gas and the attendant topped off the tank, I would replace the charcoal canister and bill the station.

How the HELL can they still be doing this in New Jersey?

Nate

[brandon]

<div class='quotetop'>QUOTE(Proco @ Sep 10 2006, 06:38 AM) [snapback]317281[/snapback]</div>

It wasn't her choice. We're not allowed to pump our own gas in NJ. The attendant did it on his own.
[/b]

That is unfortunate; however, it doesn't change my statement: you shouldn't top off.