Does buying gas in the morning or evening save me money?

Question

I found out one eHow.com it says, "Buying gas in the morning or evening, when the temperature is cooler, will help you save money. When gas is hot, it expands, and since it is sold by volume, not density, you will get more for your money." Is it true? Has anyone experienced significant mileage increasing by using this method?

Answer 1

Misa, it's complete BS. Gasoline is stored underground and the temperature doesn't vary enough daily to justify buying at certain times. These stories don't take into account that the gasoline takes less than 5 seconds to get from the underground tank into your car and there's no time for expansion. You could, theoretically, get a few ounces more into your car if the temperature of the gas is lower than the outdoor temp, but the flip is also true in the winter, when the gas is warmer.

Gasoline storage underground keeps it between 55 and 75 degrees year round. The coefficient of expansion is about 4 gallons per degree F per 9000 gallon truckload.

Gasoline is sold based on volume, but the volume is determined in the pump, not your tank. There's no way to gain an advantage, otherwise the retailers would correct for temperature in the pumps.

Answer 2

It won't save you any money unless the station you are buying from has above the ground tanks exposed to the sun.

With underground tanks like most service stations have the below ground temperature is not going to change that much to make any difference.

The only parts of the sysem above ground will be the pumps and hoses. Gas is not to to heat up enough going through them to make any difference.

Since your car's gas tank is mounted underneath it is also going to be protected from the sun's radiation and U.V. rays which cause the heating effect.

You could get a little expansion in your gas tank during the day but not enough to make much difference.

On big tractor trailers with exposed gas tanks that is a different story since their tanks are exposed to the direct sun light.

Answer 3

a extra advantageous theory - to save much according to 3 hundred and sixty 5 days - stroll, journey a motorbike, or bus.... I moved from san jose to south dakota a three hundred and sixty 5 days in the past and function in basic terms spent approximately $40 on gas interior the time I actual have been right here - and that became for a holiday to the large lakes! I actual have misplaced weight, saved money, and gotten to appreciate my associates! i like it!

Answer 4

Gasoline is stored in underground tanks that are largely unaffected by air temperature, so what you are getting from EHow and any other moron who thinks that gasoline expands and contracts enough to affect its price is total crap. Your best bet is to buy gas where it's cheapest and adopt habits while driving that increase your fuel mileage, such as driving a constant speed, keeping your tires inflated, not being a leadfoot, not speeding, avoiding stop and go traffic, keeping your car tuned up, that kind of thing.

Answer 5

Gas prices are going up again. If there is any myth to even saving a few pennies in the morning, I'm with ya. I will start doing it my self. If it is true or not I don't know.

Answer 6

haha surprisingly this is true. whenever you refill your tank when outside conditions are slightly cooler the gas is in fact denser and you are getting slightly more for your money. i doubt that this technique will help if you do it once or twice but over time i can see it saving you some money.

Answer 7

It is totally true. You will increase your mileage. not a ton, but every little bit helps

Answer 8

i'm not sure i never heard of it nor did that....but i would say it would NOT work b/c ur engine is still sucking the same amount of gas no matter what time of the day it is...

Answer 9

buying gas doesn't save you money at all...

Answer 10

it might be true but i doubt it makes much of a difference