[2V4NOW]

Co-worker sent me this email, Big plus for the 91+ - 93+ $$$ octane users...Save some GREEN when pumping gas:

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. 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 other 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 is being delivered, and you might pick
up some f the dirt that normally settles on the bottom. Hope this will
help you get the most value for your money.