OT Saving Gas

This is from an email going around about saving gas:
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 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 money.

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 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

Gas pumps here have been temperature compensated for the past five years.
Fuel temps in underground tanks very little over a month, let alone over one day/night cycle.
What floating roof in your emissions vehicle fuel tank?
Vapour return at the pumps? In California, rarely seen in other locals. Doesn't matter anyways, it's a feel good visual.
Slow medium and fast as per making vapour? Hog wash.
Keeping the fuel tank full is to limit water contamination due to condensation from temperature swings.
The advice and old wive's tales is the same stuff from 50 years ago that went around.

Have to agree with you on this one the vapor you see or could possibly see is what was already in the tank being replaced with fresh liquid.

The vapor recovery that was supposed to take affect in the early 90's had been tried but the two hose system proved to be bulky and cumbersome. so they use a splash cup and when held properly the fumes bypass through your car/truck back through your own emissions system. thus the little hose on the side of the filler tube

Might vaporize more on the slow setting?

The cap is off longer.

Gary

I think the measures you propose will save about 8 cents.

So what can I do to save another 8 cents? That old saw that your grandmother told you about watching the pennies, and the dollars will take care of themselves, may not be as applicable today.

Just sayin'.

Dejavu. It's the 70's all over again.

i can add one thing thats not a old wives tale...dont top off your tank in the morning and let your vehicle sit all day without driving a ways...gas will expand and run out vapor recovery system on newer vehicles and back out the cap on old stuff.

Aren't the underground tanks down far enough that the temp doesn't change?

You"ll save a lot more by driving like your grandmother: easy on the takoffs, calm down a few mph, back off and feather or let it coast when you can see you"ll have to stop, etc...makes the equipment last longer, too...
The old Pure Oil mileage runs were full of this stuff.

I just keep trips to a minimum and combine stops as much as possible.
I do appreciate all of the comments though.

Bill.

Want to reduce the nation's fuel consumption?
Ban and drive-throughs and make folk waddle their fat behinds into the store, bank or restaurant.

They say there is no shortage. It's been said many times on the news......No Shortage.

Best advice is remove unnecessary items which are just added weight, which take more gas to carry that weight.

Also, don't "FILL UP" It's the same thing,...full tanks are heavier than say a half tank.

A hint that I have heard is to fasten your seat belt and get everything else ready before you start your engine. And don't forget your coffee cup on the roof.

Yes, the story is BS. I plan on making improvements on my jeep for better milage, after market air intake, exhaust, and accelerator chip.

Last summer , the wife and I , went back to popular Bluffs to visit my oldest boy, who works for Raben tire. He talked us into filling our car tires with nitrogen, and wanted a report on gas savings, when we got back home to washington. We had monotored our mileage on the way out and knew that we got 33 mpg. After the return trip we averaged 3 mpg better, at 36 mpg. I reckon we could all fill up with nitrogen, and run those green valvecaps!

Yup I've done that many times- late at night and 60plus miles to the next available fuel...ease up over hills, coast in nuetral down the next and give just enough gas to make it over the next...basically drive like a grandma! Concious thought to every minute input on the accelerator pedal! It kinda adds an element of excitement to an otherwise long monotonous drive out here in the middle of nowhere, not knowing if you'll make it or not! Never ran out and been stranded...yet!

Only one sure way to save gas.I parked the truck on Feb 14, didnt run it again until Mar 9.

You are right it's all about revenue. They talked everyone into cutting back on water usage by using low flow toilets, low flow shower heads, and cut lawn sprinkling. Now they had to raise water rates because of lack of demand because they still had to maintain the water pumping stations and keep the grid working.

You know what ticks me off? When there's 30 cars in the drive through at Tim Horton's, and they're blocking traffic on a main throughfare, and there's only about 2 people at the counter inside. Not that I ever go to Timmie's anyway, but they impede my drive through town..... the lazy bass turds.

Low flow toilets what a JOKE !

You have to use two or three times the water to take care of business that one GOOD flush would do.

Well, if the world can save daylight by setting all the clocks ahead an hour one should be able to save gasoline by pushing the automobile forward a mile.
Of course the effort may be counter-productive because of the methane expelled by the pushing.

Just how exactly does filling the tires with N2 instead of air make any difference?
Automobile manufactures would be filling tires with N2 to improve fleet mileage if it actually worked.

Thats funny,,,,,, I havent heard the term Hogwash in a while lol J

Normal air is about 80% nitrogen anyway, what's another 20% going to do for mileage? Answer: Very little...

I heard it doesn't leak out as easy so you are not driving on underinflated tires. To gain 3 MPG he may have been low on pressure to begin with.

Yes, I've heard that nitrogen molecules are larger than oxygen molecules, so they don't leak through the tire as easily. But if that's true, then every time you top off your slowly leaking tires with regular air, the percentage of nitrogen in your tires should increase. You won't get to 100%, but...

(quoted from post at 20:02:13 03/14/11) Yes, the story is BS. I plan on making improvements on my jeep for better milage, after market air intake, exhaust, and accelerator chip.

Click to expand...

The joke is going to be on you, because none of those products actually work as advertised.

Notice how they say, "can," and "up to" in the commercials? That's because the results they advertise are the best-case scenarios. For most people the improvements are minimal, to none at all.

The stuff I'm looking at DOES work, because of better engineering, and has been independantly tested and the companies have been around for a while. When you get less restricted air and exhaust flow you get better milage, that's a FACT. And performance chips make the engine more responsive. Maybe you should read more often.

Usually reducing restrictions in intake and exhaust flow give you more more power, not necessarily better mileage... but as the saying goes - "your mileage may vary"!

I tried the Nitrogen in the tires trick, it saved me about 10%. I installed new air filter, and one of those turbo air plenums, under the TBI, saved another 10%. Put some of them fuel line magnet thingies( I figgered if one is good, 5 ought to be better!) on my fuel lines, rotated my tires, coast down the hills, never jackrabbit start, Now I am savin so much gas, that every little while, I have to stop, and let a little gas out of the tank, of course I save that, too. I use that to fuel my Essex tridirectional tractor!

amen ,, while your at it ,,git rid of the stop lites and cop carz givin out tikets , make all carz out of tupperwrae so that minor contact would not cause a traffic stoopping offense requiring ins info swap,. now wre is my beer?