Tips On Pumping Gas
From an email I received....
Here are some tricks to get more of your money's worth for every gallon. Here at the _____ Pipeline where I work in 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 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 of the dirt that normally settles on the bottom. Hope this will help you get the most value for your money. |
This seems to turn up every few months or so.
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I know Myth Busters tested the temp thing and said it was a bust. Given that the temp under ground is pretty constant, buying your fuel at 2am or 2pm is not going to affect the temp of the fuel in the underground tanks to amount to much of a difference.
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Riding a bike or walking actually DOES save fuel . . . .
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Another chain email.
Not using your car seems to save the most!:D |
The idea of filling up when you're half-full to save on vapors is nonsense.
For every gallon you pump in, one gallon of vapor must be removed. If you fill up when half-full, you only get half the vapors, but you must fill up twice as often. There is no net gain. |
Just to be on the safe side, I'm sending this to everyone I know.
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What, no tips on pumping diesel?:D
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These helpful hints will just about counter the effects of Manmade Global warming.
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I seem to recall a notice on Canadian pumps, something like this:
"Volume adjusted to 15C." Alex |
That's because it's colder in Canada, so the stations voluntarily install temperature-compensating pumps. They make more money that way.
Further south, they make more money from not compensating for temperature, so they won't install the pumps by themselves. |
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