The 2nd email "New Gas Tips"

New Gas Tips (Every penny counts).
I don't know what you guys are paying
for gasoline....
Here in California we are also paying higher,
up to $3.50 per gal.  But 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 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.           
A1-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.
In slow mode you should be pumping on low speed,
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 or HALF EMPTY. 
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
being delivered, and you might
pick up some of the dirt that normally
settles on the bottom.

I edited this email and took names
out as not to
get anyone in trouble.