Fuel Up at Night...

[MNBoxster]

Originally Posted by JackG

Gas is stored in underground tanks... which automatically regulates the temperature of the gas. On 100 degree days, you're not buying 100 degree gas, just like the gas isn't 0 degrees when the outside temp is 0.

From an edu website: "If you take the average yearly temperature (see Table 1) of an area, that will approximately give the constant ground temperature at about 30 feet below the surface of the ground in an area which is exposed to the sky."

In other words, if you live in the north, you get a better deal, year-round. If you live in the warmer south, you don't do as well. But there's probably little actual difference from month to month in the same area... at least not as much as that article leads you to believe. And especially not day to day, as the earth many feet down from the surface simply can't react that fast.

Hi,

Yes, but the Tanks are Vented and so pull in Ambient Temperature Air to offset the Gas which is pumped out. How much difference this makes probably depends on the Air Temp, how full the Tank is, etc...

Happy Motoring!... Jim'99

[BobMarley1]

Filling up in the morning!

[JackG]

Originally Posted by MNBoxster

Hi,

Yes, but the Tanks are Vented and so pull in Ambient Temperature Air to offset the Gas which is pumped out. How much difference this makes probably depends on the Air Temp, how full the Tank is, etc...

Happy Motoring!... Jim'99

Of course... then that newly introduced air is quickly warmed/cooled by the far greater mass of gas/metal/air that is already at the underground temp.

The point is that it's not a huge temperature swing, but rather just a few degrees, and it moves very slowly over weeks/months, not over a few hours.

I'm sure there is a minor difference in the quantity I get when I purchase gas in January as opposed to July, but not when the air temp falls 20 degrees for just 4 or 5 hours or even a few days, and the underground temp hasn't changed.

But hey, if it makes you feel good, then do it!