With the price of gas we are paying,here are some tricks to get more of your money's worth for every
gallon..
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.In slow mode 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 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 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,every truck thats loaded 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 and WATER that normally settles on the bottom.NEVER,this is a fact.

Hope this will help you get the most value for your money.

Good tips, but the number one reason gas prices are so high is because we're willing to pay those high prices.

I'm not so sure about filling it when you're 1/2 full. Cars have a vapor recovery system, so you're not going to lose anything from it evaporating. If anything, I'd figure you'd be better off keeping it less full because with less gas in your vehicle it would weigh less, therefore using less gas to pull it around.

This is just mind blowing!!!

OMG, I have been doing everything wrong!

Thanks for the info.

Lindyy

I can see a few holes in these tips.

1. The underground stays pretty much at 55-58° so the time of day really won't matter.

2. If your fuel tank is made of steel then letting it remain empty will cause it to rust from the inside out. Air is humid and the constant heating and cooling during the day and night will condense water on the inside. A plastic tank will still condense water but will not rust.

3. This might be the only good tip to watch out for. Not only is there sediment (usually caught by the filters) and water being stirred up, but in the summer the fuel would be warmer than the underground and you would theoretically be getting less fuel. This would not be the case in the winter when the fuel is colder and more dense.

Do I worry about this? Hell no! I use about 150 gallons of diesel fuel a month. I worry about price only.

after three feet below service ground temp
in most of the us stays the same
even if it did not it would
not change in a matter of hours
except maybe the top couple inches
(if that close to service tank would collapse when driven on)

not sure about the vapor rate difference at a slower rate of pumping you make vapors for a longer period of time
may be a trade off (put not an unreasonable assumption)

it is best to leave tank at least half full at all times


yes i always avoid get fuel when tank is getting filled
sediment getting disturbed could cause fuel system issues

I take the bus....

put that out no smoking on the bus

well even with gas prices high and going higher- I am still going to be paying whatever the price is because I am not riding a bicycle or walking to where I need to go... I will just do without something else in my life or not go as often.