From: Chuck Olson on
I write down what my Prius says my average MPG was when I fill up. Then I
calculate from the miles and gallons pumped what my average MPG was and
write that down. They rarely agree, and almost always the pump says my MPG
was less than my Prius said. But once in a while, the pump MPG is higher
than the Prius MPG, and when I go back to that pump, it always shows higher
MPG. This lasts until the pump checker comes around and fixes it. Then off I
go on a new search for a high MPG pump. The latest pump gave me 54 MPG when
the Prius said 50.6.

Maybe you just have to go to the pump that's in the sun rather than one
that's nice and shady, or the pump that is off to the side compared to the
natural flow of traffic through the pump aisles. But you can find that
golden pump - - you just have to believe in the MPG reading your car
calculates, and use that as the standard of comparison.


From: mack on

"Chuck Olson" <chuckolson01(a)REMOVETHIScomcast.net> wrote in message
news:8eWdnQysP_e1ZebbnZ2dnUVZ_qOpnZ2d(a)comcast.com...
>I write down what my Prius says my average MPG was when I fill up. Then I
> calculate from the miles and gallons pumped what my average MPG was and
> write that down. They rarely agree, and almost always the pump says my MPG
> was less than my Prius said. But once in a while, the pump MPG is higher
> than the Prius MPG, and when I go back to that pump, it always shows
> higher
> MPG. This lasts until the pump checker comes around and fixes it. Then off
> I
> go on a new search for a high MPG pump. The latest pump gave me 54 MPG
> when
> the Prius said 50.6.
>
> Maybe you just have to go to the pump that's in the sun rather than one
> that's nice and shady, or the pump that is off to the side compared to the
> natural flow of traffic through the pump aisles. But you can find that
> golden pump - - you just have to believe in the MPG reading your car
> calculates, and use that as the standard of comparison.

If you're looking for the "golden" pump, you probably won't find it in the
sun. The sun's heat makes gasoline volume expand, so you actually get a
little less than you would pay for if you bought your gasoline during the
hours of darkness, when it's usually cooler. It's not a big thing, but it
could make a small difference in your calculated mileage figures.


From: Jeff on
mack wrote:
> "Chuck Olson" <chuckolson01(a)REMOVETHIScomcast.net> wrote in message
> news:8eWdnQysP_e1ZebbnZ2dnUVZ_qOpnZ2d(a)comcast.com...
>> I write down what my Prius says my average MPG was when I fill up. Then I
>> calculate from the miles and gallons pumped what my average MPG was and
>> write that down. They rarely agree, and almost always the pump says my MPG
>> was less than my Prius said. But once in a while, the pump MPG is higher
>> than the Prius MPG, and when I go back to that pump, it always shows
>> higher
>> MPG. This lasts until the pump checker comes around and fixes it. Then off
>> I
>> go on a new search for a high MPG pump. The latest pump gave me 54 MPG
>> when
>> the Prius said 50.6.
>>
>> Maybe you just have to go to the pump that's in the sun rather than one
>> that's nice and shady, or the pump that is off to the side compared to the
>> natural flow of traffic through the pump aisles. But you can find that
>> golden pump - - you just have to believe in the MPG reading your car
>> calculates, and use that as the standard of comparison.
>
> If you're looking for the "golden" pump, you probably won't find it in the
> sun. The sun's heat makes gasoline volume expand, so you actually get a
> little less than you would pay for if you bought your gasoline during the
> hours of darkness, when it's usually cooler. It's not a big thing, but it
> could make a small difference in your calculated mileage figures.

It's the temperature of the gas when it goes through the mechanism that
measure the volume, not the nozzle. Gasoline when it comes out of the
ground is a more or less temp because the ground is a much more constant
temp than the air. So changing the time of day that you get gas doesn't
matter. The only thing you don't want to do is get the gas right after
the tanks are filled, so that the dirt in the tank is not stirred up.

The angle at which your car sits, the speed of fuel going into the tank,
when the the nozzle kicks off and how the tank it topped off are going
to make more of a difference about how much gas gets into your car's
tank at a particular fill-up. Over the long haul, though, it will even out.

The other thing I do know is that it is possible to adjust the volume of
fuel going into the tank according to the temperature at the volume
measuring device in the pump. Except in Alaska and Canada and other
Northern parts of North America, it is rarely done on continent. In
fact, in some states OPW, which is a company that makes the device won't
even sell it. I guess the oil companies don't want people to get that
finally 1% of gas that they pay for.

Jeff
From: Mike Hunter on
Either way if he is lucky, in four or five years, the mileage he is getting
will help him recover some of the premium price he paid to by the Prius.

mike


"Chuck Olson" <chuckolson01(a)REMOVETHIScomcast.net> wrote in message
news:8eWdnQysP_e1ZebbnZ2dnUVZ_qOpnZ2d(a)comcast.com...
>I write down what my Prius says my average MPG was when I fill up. Then I
> calculate from the miles and gallons pumped what my average MPG was and
> write that down. They rarely agree, and almost always the pump says my MPG
> was less than my Prius said. But once in a while, the pump MPG is higher
> than the Prius MPG, and when I go back to that pump, it always shows
> higher
> MPG. This lasts until the pump checker comes around and fixes it. Then off
> I
> go on a new search for a high MPG pump. The latest pump gave me 54 MPG
> when
> the Prius said 50.6.
>
> Maybe you just have to go to the pump that's in the sun rather than one
> that's nice and shady, or the pump that is off to the side compared to the
> natural flow of traffic through the pump aisles. But you can find that
> golden pump - - you just have to believe in the MPG reading your car
> calculates, and use that as the standard of comparison.
>
>


From: EdV on
If you want to do all the fuss then you can buy a 10 gallon fuel
container. At the gas pump fill it up to 10 gallons and check if it
match the proper level. After that you pour the gas to your tank.