Gas pump accuracy?

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.

mack wrote:

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

i usually top off.. add another dollar of gas to the car after the automatic
click..

That is a bad habit to get  in to.  Besides the risk of spills, there is a
chance, albeit small, that you can contaminate the charcoal canister from
constant overfilling.  When the pump clicks off, I just round up to the
nearest nickel or dime.
--

Ray O
(correct punctuation to reply)

 "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:


GOOOOD advice Ray.  I see so many trying to top it off and then
spilling, wasting fuel, not to mention the flash fire danger.  There
ought to be a law......

--



carpetbagger:  a person perceived as an unscrupulous opportunist
 
"I'm not going to have some reporters pawing through our papers.
We are the President."  Hillary Clinton

I think it is illegal to top off in many locations, and many pumps have
warnings not to top off...
--

Ray O
(correct punctuation to reply)

"Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message

Yeah, as if anyone pays THOSE warnings any more heed than they do software
EULA's or those warnings on DVD's about copying them.

True... I guess those warnings fall into the same category as furniture tags
:-)
--

Ray O
(correct punctuation to reply)

At least in New Jersey, we have pump attendants that fill our tanks
for us.

What's the argument for and against this practice?

pump attendants will not overfill. most of the time, they leave the
car when the it is being filled and when they come back the fill is
complete. with no time to refill upto the brim, they just take off the
nozzle when done. they also will not put gas when your engine is
running or someone in the car is operating a mobile phone.

Why is a mobile phone dangerous?

--
Scott in  Florida
 
There ought to be one day-- just one--
when there is open season on senators.

     Will Rogers (1879 - 1935)

 

"Scott in Florida" ...

Scott - I saw a surveillance video at work a couple of years ago in Safety
training where someone standing next to their car turned on their phone
and the fumes lit up.  That person was standing out at the pump nozzle
pumping IIRC.  Apparently there can be a slight spark or its
electromagnetic field can byproduct an arc or somesuch.  Not really sure,
but it convinced me well enough.
Tomes

And that's how it should be even for people who pump their own.

"EdV" ...

I live in NJ too.  This ought to be stated that Pump attendants are not
supposed to do these things.  I have seen every one of these things done
at stations in NJ: topping off, gassing when the car is on, and gassing
when the driver is on the phone.  It is so reassuring that we have these
highly trained technologists working this dangerous job for us.

Now I take my tongue back out of my cheek and state that I would not want
to trade in this practice at all.  It is extremely convenient that I do
not need to get out and do it, especially when it is bad outside.  I also
do not buy the counter argument that having up pump it ourselves will save
us on gas prices.  A couple of cents does not matter much now at these
prices anyway, and NJ gas is among the cheapest in the nation due to a
relatively low gas tax rate.  This is one of the reasons that I like
living in NJ.
Tomes

To stop idiots from hurting themselves or others and to save Punjab and
Singh from loosing their jobs   ;)

mike

warning signs are everywhere, coffe cups with caution hot, escalators
that tell you to hold the rails, I wonder when they will put labels on
cars that say Warning! improper driving may cause serious injuries or
death... or better yet, achtung! drunk driving while on probation can
lead to 45 days in prison.

In the Navy, there are a lot of warning signs.  We used to try to
figure out who and how some poor sailor got maimed or killed to
warrant the sign....



--
Scott in  Florida
 
There ought to be one day-- just one--
when there is open season on senators.

     Will Rogers (1879 - 1935)

 

"EdV" ...

On my Jeep Wrangler, a vehicle that is more tippy than most, it says this
on the visor:
"Avoid abrupt maneuvers and excessive speed ....   See owners manual for
further information"
There you go Ed, these warnings are already appearing...
Tomes