Racingjunk Forums - gas tips, good read.

Here a email I recieved from a friend on mine via gmail thats worthy of a read especially with gas prices being so high.
><Charles

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TIPS ON PUMPING GAS (Good information)

I don't know what you guys are paying for gasoline.... but here in
California we are also paying higher, up to $3.50 per gallon. But my
line of work has been 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 no t 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 t his 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.

Hope this will help you get the most value for your money. DO SHARE
THESE TIPS WITH OTHERS!