Comments on: Does Buying Your Gas In The Early Morning Really Save Money? http://lenpenzo.com/blog/id588-does-buying-your-gas-in-the-early-morning-really-save-money.html The offbeat personal finance blog for responsible people. Thu, 16 Feb 2012 20:41:50 +0000 hourly 1 http://wordpress.org/?v=3.0.4 By: Who Saves the Most Money? Early Birds vs. Night Owls http://lenpenzo.com/blog/id588-does-buying-your-gas-in-the-early-morning-really-save-money.html#comment-53640 Who Saves the Most Money? Early Birds vs. Night Owls Thu, 19 May 2011 15:01:24 +0000 http://lenpenzo.com/blog/?p=588#comment-53640 [...] Save money on fuel costs-especially during the warm weather months-as heat affects causes gasoline to expand in weight (but not volume). So, you will actually get your money’s worth when you buy your [...] [...] Save money on fuel costs-especially during the warm weather months-as heat affects causes gasoline to expand in weight (but not volume). So, you will actually get your money’s worth when you buy your [...]

]]> By: Vince http://lenpenzo.com/blog/id588-does-buying-your-gas-in-the-early-morning-really-save-money.html#comment-329 Vince Wed, 20 Apr 2011 20:48:56 +0000 http://lenpenzo.com/blog/?p=588#comment-329 We should submit this to the mythbusters. Install one thermometer inside the underground gas tank, one inside the nozzle and one for ambient air temp and graph the differences, if any. For the temperature of the gas at the nozzle, I expect the temp to decrease quickly as cool gas absorbs heat from the hotter hose and pipes. We should submit this to the mythbusters. Install one thermometer inside the underground gas tank, one inside the nozzle and one for ambient air temp and graph the differences, if any.

For the temperature of the gas at the nozzle, I expect the temp to decrease quickly as cool gas absorbs heat from the hotter hose and pipes.

]]> By: BigGeek http://lenpenzo.com/blog/id588-does-buying-your-gas-in-the-early-morning-really-save-money.html#comment-330 BigGeek Wed, 20 Apr 2011 20:48:56 +0000 http://lenpenzo.com/blog/?p=588#comment-330 It's true...According to the Canadian Petroleum Products Institute, "it is estimated that a given volume of gasoline will increase or decrease approximately by 1/8 of 1% for every degree of temperature change." Might be negligible...or not if you have large temperature swings where you're buying gas. As far as I know, US pumps sell gas based on volume at ambient temperature without temperature correction. There are also vapour recovery devices on the nozzles that suck back gasoline vapours from your tank AFTER you've already paid for it. Grr. On Canadian pumps, volumes are corrected to 15 degrees Celsius. Actually, that works in our favour only on days above 15 C, and we get gouged on volume compared to non-corrected ambient sales most of the year when it's colder than that! It’s true…According to the Canadian Petroleum Products Institute, “it is estimated that a given volume of gasoline will increase or decrease approximately by 1/8 of 1% for every degree of temperature change.” Might be negligible…or not if you have large temperature swings where you’re buying gas.

As far as I know, US pumps sell gas based on volume at ambient temperature without temperature correction. There are also vapour recovery devices on the nozzles that suck back gasoline vapours from your tank AFTER you’ve already paid for it. Grr.

On Canadian pumps, volumes are corrected to 15 degrees Celsius. Actually, that works in our favour only on days above 15 C, and we get gouged on volume compared to non-corrected ambient sales most of the year when it’s colder than that!

]]>