Tips from a gas guy...F.Y.I - Chicago Illinois Fishing Forum, Information & Reports
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Old 05-15-2008, 01:52 PM   #1 (permalink)
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Hunden's Avatar
Join Date: Mar 2007
Location: Fundee,Illinois
Posts: 1,655
Default Tips from a gas guy...F.Y.I

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 pet roleum 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

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 ro of. 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
"How do I feel about gun control? Break into my house one night and find out"
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Old 05-15-2008, 03:52 PM   #2 (permalink)
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Join Date: Dec 2003
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Hunden thaks for the info, but I have a question if gasoline evaporates so quick how come my gas can doesnt empty in my garage by it self then? Not trying to be a smart ass just curious.
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Old 05-15-2008, 04:36 PM   #3 (permalink)
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Location: East side of the West burbs
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It needs to be agitated(not ticked off)
Quando Omni Flunkus Moritati
When all else fails, play dead
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