Interesting!!!
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 gallon age 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.)
4. 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 acts 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.
5. Do not top off your gas tank, when the pump shuts off, do not
keep trying to add more gas..................a friend who owns a
gas station says that by doing this, you are actually giving the
next customer a $1.00 worth of gas. The gas you pump stays in the hose
and never makes it to your tank...........good to know.
