Saving Money at the Pump

With the gas prices they way they are, I thought some most of you might be interested in some helpful tips I've received from an email:

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.