The Truth About Pumping Gasoline

[GetAboutRL]

A local television station did a story on gasoline pumping and I thought you all might find it of interest.
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The Truth About Pumping Gasoline

An e-mail has been circulating with tips on how to get more gas for your money, but are the facts true? CBS-6 talked to the NYS Association of Service and Repair Shops Executive Director, Ralph Bombardiere, to get the facts.

Here are the Claims:

1. Only fill up your vehicle in the early morning
- All gas stations keep their storage tanks underground. In the early morning the ground temperature is still cold, therefore making the gas more dense, or compact. When the gas gets warmer (during the day), it will expand and you won't pump a "full" Gallon. So remember to fuel-up when the birds are chirping.

Bombardiere Says:
"This is true to some degree. The average temperature of gasoline in an underground is about fifty-two degrees. Any increase in the outside temperature will increase the volume. If the temperature is zero degrees in the morning and the gas is pumped it will loss volume but not as much as it will in the afternoon if the ambient temperature rises. The same is true when the ambient temperature is over fifty degrees. Example if the outside temperature is sixty degrees the volume increases when it is pumped, fifty-two decreases to sixty degrees. If it is pumped in the afternoon ad the temperature rises to seventy-five degrees the volume increase even more. Fifty-two degree to seventy-five degrees. The difference is really negligible."


2. When fueling, pump slowly.
- You should notice that the more you pull the pump-trigger, the faster the gas comes out. All fuel pumps have a vapor-return, which sucks unwated vapors back into the storage tank underground. When gas is pouring into your tank quickly, it is creating vapors that are being sucked right back into the underground tank. Slower pumping reduces the amount of vapor created in your tank. Next time you're at the pump, take it easy on the trigger-finger and get more for your money.

Bombardiere Says:
"First most stations do not have the three stage speed nozzle in New York. They were illegal for a long time at self service stations stations. They guidelines by the National Fire Association has changed but most New York Municipalities still restrict the us of hold open nozzles at self service

There is air and vapor in every tank. No matter how fast or slow the pump is operated the air and vapor will be forced out of the tank. Liquid taking the place of air. At stations with Stage II Vapor Recovery the fumes are vacuumed out. I don’t see where this saves any gasoline."


3. Fill up when your tank is half full.
- The reason for this can be described in one word: Evaporation. The more gas you have in your tank, the less space will available to be taken up by air. Gasoline evaporates at an incredibly fast rate. With more empty space in your tank, more room will be available for evaporated gas to fill - and take away from your supply. So think like an optimist and fill your tank when it's "half-full."

Bombardiere Says:
"First, in New York, all deliveries are temperature corrected to sixty degrees. The average year round temperature for New York is about fifty nine degrees. Therefore, a temperature correction of sixty degrees averages out for New Yorkers.

The floating roof is true, but those tanks hold thousands of gallons of gasoline. It is true that gasoline vaporizes quickly and will turn from liquid to vapor quickly. If it does not have an opportunity to change back to a liquid, the motorist loses volume. The amount of volume from fill up to fill up is negligible, but over a like time it could add up."


4. Don't fill when they are.
- If a gas truck is filling up the station's tanks, don't pump. The gas flowing into the undreground storage tanks will stir up the dirt and sediment that noramlly sits on the bottom of the tank and put it into your engine. Keep it clean and if you see a station getting refilled go somewhere else for your gas.

Bombardiere Says:
"This is a tale that has been around for years. In fact New York City has a law that make prohibits the dispensing of motor fuel of the brand that is being delivered. There is no other state or municipality that has such a law. If this were true, that the delivery stirred up dirt, we would have cars stuck all over the road."

[RedHeaded RedLine]

Originally Posted by GetAboutRL

A local television station did a story on gasoline pumping and I thought you all might find it of interest.
===============================================

The Truth About Pumping Gasoline

Only fill up your vehicle in the early morning
I am on my way to work, my time is worth something. I am not getting up any earlier. If anything we usually gas up late at night, just before we go home.

When fueling, pump slowly.
I make sure that the cover that seals the tank doesn’t seal, lets the tank vent faster, not a lot of splahback after the first gallon or so. Again, my time is worth something.

Fill up when your tank is half full.
With a 13G tank that would be every 3 days. Again, my time is worth something.

Don't fill when they are.
We have 2 Sunoco stations on either side of one block, if one has a truck, we go to the other one. -J

[marlboromike]

that was quite educational...even an old dog LEARNS...Skip r u listening..

[Rick Tinley Park]

Originally Posted by GetAboutRL

1. Only fill up your vehicle in the early morning
- All gas stations keep their storage tanks underground. In the early morning the ground temperature is still cold, therefore making the gas more dense, or compact. When the gas gets warmer (during the day), it will expand and you won't pump a "full" Gallon. So remember to fuel-up when the birds are chirping.

Bombardiere Says:
"This is true to some degree. The average temperature of gasoline in an underground is about fifty-two degrees. Any increase in the outside temperature will increase the volume. If the temperature is zero degrees in the morning and the gas is pumped it will loss volume but not as much as it will in the afternoon if the ambient temperature rises. The same is true when the ambient temperature is over fifty degrees. Example if the outside temperature is sixty degrees the volume increases when it is pumped, fifty-two decreases to sixty degrees. If it is pumped in the afternoon ad the temperature rises to seventy-five degrees the volume increase even more. Fifty-two degree to seventy-five degrees. The difference is really negligible."

Hahahahaha --- If the tank is underground (and they are and rather deep too) then the temps underground are not going to vary that much day to night. That's why wine is kept underground. Also if it is 20 degrees warmer outside the fuel will not SUDDENLY rise in temp as you fill your tank. You most likely will get a higher temp rise just from going through the pump... Negligible?? Hardly that...

[gadget]

4. Don't fill when they are.
- If a gas truck is filling up the station's tanks, don't pump. The gas flowing into the undreground storage tanks will stir up the dirt and sediment that noramlly sits on the bottom of the tank and put it into your engine. Keep it clean and if you see a station getting refilled go somewhere else for your gas.

Bombardiere Says:
"This is a tale that has been around for years. In fact New York City has a law that make prohibits the dispensing of motor fuel of the brand that is being delivered. There is no other state or municipality that has such a law. If this were true, that the delivery stirred up dirt, we would have cars stuck all over the road." [/size][/quote]

This is true especially at older stations crud gets into the tanks over time some stations have filters on the pumps that filters most of it out. I don't want to be the guinea pig that tests to see which ones are ok. You can if you like to hang around the saturn dealerships while they drop your tank.
I've gotten bad gas before on other vehicles and it sucks!