Forwarded from a man who works with gas!!!
I've been in petroleum pipeline business
for about 31 years,
currently working for the Kinder-Morgan Pipeline
here in San Jose, CA.
Here are some tricks
to help you get your money's worth:
1.
Fill up your car or truck in the morning
when the temperature is still cool.
Remember that all service stations
have their storage tanks buried below ground;
and the colder the ground,
the denser the gasoline.
When it gets warmer gasoline expands,
so if you're filling up in the
afternoon or in the evening,
what should be a gallon
is not exactly a gallon.
In the petroleum business,
the specific gravity and temperature
of the fuel
(gasoline, diesel, jet fuel,
ethanol and other petroleum products)
are significant.
Every truckload that we load
is temperature-compensated
so that the indicated gallonage
is actually the amount pumped.
A one-degree rise in temperature
is a big deal for businesses,
but service stations don't have
temperature compensation
at their pumps.
2
If a tanker truck is filling the station's tank
at the time you want to buy gas,
do not fill up;
most likely dirt and sludge in the tank
is being stirred up when gas is being delivered,
and you might be transferring that dirt
from the bottom of their tank into your car's tank.
3.
Fill up when your gas tank is half-full
(or half-empty),
because the more gas you have
in your tank the less air there is
and gasoline evaporates rapidly,
especially when it's warm.
(Gasoline storage tanks
have an internal floating 'roof' membrane
to act as a barrier between the gas
and the atmosphere,
thereby minimizing evaporation.)
LOOK AT THIS ONE...
If you look at the trigger you'll see that
it has three delivery settings:
slow, medium and high.
When you're filling up
do not squeeze the trigger of the nozzle
to the high setting.
You should be pumping at the slow setting,
thereby minimizing vapors created
while you are pumping.
Hoses at the pump are corrugated;
the corrugations act as a return path
for vapor recovery from gas that
already has been metered.
If you are pumping at the high setting,
the agitated gasoline contains more vapor,
which is being sucked back
into the underground tank, so you're getting less
gas for your money.
Hope this will help ease your
'pain at the pump'.
