JOSHUA TIME 941

Gasoline
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> I've been in petroleum pipeline business for about 31 years, currently
> working for the Kinder-Morgan Pipeline here in San Jose , CA . We
> deliver about 4 million gallons in a 24-hour period from the pipe
> line; one day it's diesel, the next day it's jet fuel and gasoline. We
> have 34 storage tanks here with a total capacity of 16,800,000
> gallons. Here are some tricks to help you get your money's worth.
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> 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 .
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> 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 .
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> 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 )
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> 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 act 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.
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