Not to rain on any parades...

http://www.snopes.com/inboxer/household/gastips.asp

Jim
Wilmington, NC

On Thu, Mar 10, 2011 at 9:25 AM, John Rodgers <inua@charter.net> wrote:

>  This came from a friend's friend in CA. Dunno the efficacy of it but
> seems reasonable.  Hope it helps us all.
>
> John
> *****************
>
>    TIPS ON PUMPING GAS
>    I don't know what you guys are paying for gasoline.... but here in
> California we are paying up to $3.75 to $4.10 per gallon. My line of
> work is in petroleum for about 31 years now, so here are some tricks to
> get more of your money's worth for every gallon:
>
>    Here at the Kinder Morgan Pipeline where I work in San Jose, CA we
> deliver about 4 million gallons in a 24-hour period thru the pipeline..
> One day is diesel the next day is jet fuel, and gasoline, regular and
> premium grades. We have 34-storage tanks here with a total capacity of
> 16,800,000 gallons.
>
>    Only buy or fill up your car or truck in the early morning when the
> ground temperature is still cold. Remember that all service stations
> have their storage tanks buried below ground. The colder the ground the
> more dense the gasoline, when it gets warmer gasoline expands, so buying
> in the afternoon or in the evening....your gallon is not exactly a
> gallon. In the petroleum business, the specific gravity and the
> temperature of the gasoline, diesel and jet fuel, ethanol and other
> petroleum products plays an important role.
>
>    A 1-degree rise in temperature is a big deal for this business. But
> the service stations do not have temperature compensation at the pumps.
>
>    When you're filling up do not squeeze the trigger of the nozzle to
> a fast mode. If you look you will see that the trigger has three (3)
> stages: low, middle, and high. You should be pumping on low mode,
> thereby minimizing the vapors that are created while you are pumping.
> All hoses at the pump have a vapor return. If you are pumping on the
> fast rate, some of the liquid that goes to your tank becomes vapor.
> Those vapors are being sucked up and back into the underground storage
> tank so you're getting less worth for your money.
>
>    One of the most important tips is to fill up when your gas tank is
> HALF FULL. The reason for this is the more gas you have in your tank the
> less air occupying its empty space. Gasoline evaporates faster than you
> can imagine. Gasoline storage tanks have an internal floating roof. This
> roof serves as zero clearance between the gas and the atmosphere, so it
> minimizes the evaporation. Unlike service stations, here where I work,
> every truck that we load is temperature compensated so that every gallon
> is actually the exact amount.
>
>    Another reminder, if there is a gasoline truck pumping into the
> storage tanks when you stop to buy gas, DO NOT fill up; most likely the
> gasoline is being stirred up as the gas is being delivered, and you
> might pick up some of the dirt that normally settles on the bottom.
>    To have an impact, we need to reach literally millions of gas
> buyers. It's really simple to do.
>
> --
> John Rodgers
> Clayartist and Moldmaker
> 88'GL VW Bus Driver
> Chelsea, AL
> Http://www.moldhaus.com
>