Heard that buying gas for your car in early morning gives you more (cold temp reduces liquid volume). Makes sense. But they also say that you have to go full tank. How valid are these advisories?
2007-12-28 22:20:19 · 14 answers · asked by tenbreedmountaindog 2 in Cars & Transportation ➔ Maintenance & Repairs
it is true..i saw it on discovery on their program myth busters..
i think even if you don't go full tank it still matter..it really reduces volume quantity of the gas and the gasoline pump still cold in the morning as a result you get more value of your money when we gas up in the morning.
2007-12-28 22:29:42 · answer #1 · answered by mackie 5 · 0⤊ 1⤋
Depends what you want to do.
When the gass, sorry petrol, is cold it is denser. The pump measures volume not weight, so you will get more gass for your dollar. However, since the petrol is stored underground it may be at a constant temperature anyway so there is no benefit. If you own a racing car and just want to go further, then putting cold gass in your car will take you further and your tank will fit more in because if something is denser it takes up less volume. This only depends on the temperature of the new petrol so there is no benefit in using a whole tank before filling up.
2007-12-28 22:49:51 · answer #2 · answered by Anonymous · 1⤊ 2⤋
It's true but the temperature difference between the morning and the rest of the day has to be significant for any noticeable effect. Personally just find the cheapest gas and keep your tank above a half tank.
2007-12-28 22:29:57 · answer #3 · answered by Anonymous · 1⤊ 2⤋
In Canada, the pumps are adjusted for temperature because it is in the station's favor. In the hot climates of the US, like California and Texas, there is no adjustment because it is in the station's favor not to adjust. Therefore, if you fill up in the early am or evening, you may actually get what you are paying for rather than 10% or so less. I have never heard the full tank back story, but always buy Weds/Thurs especially when in the Midwest because they always jack the prices up on the weekend. Try gasbuddy.com for low prices in your area.
2007-12-28 22:25:56 · answer #4 · answered by Ginger 6 · 0⤊ 2⤋
Yes, gas up early because the heat expands your gas tank and the pumps.. Ive done it.. I have put 20 bucks in my tank in the afternoon about 3 pm, I live in Florida, and I only get about one quarter of a tank for 20 bucks.. at 8 a.m. I get 20 bucks in gas and get half tank.. thats true.
2007-12-28 22:25:30 · answer #5 · answered by Its not Rocket Science 4 · 0⤊ 2⤋
Yes it is true, the pumps in the US are not monitored for fuel density. Cooler fuel is more or less compressed, thereby giving you more bang for your buck. Overall it may only be 1-3 percent but over time it will add up. As far as a full tank is concerned, I believe it would help impede evaporation on a miniscule level. Filling your tank would help maximize your gain when filling during cooler temperatures.
2007-12-28 23:07:04 · answer #6 · answered by Jeff S 2 · 1⤊ 3⤋
Depending on the year of the car, if it is newer than around the 2002 or 2003 area you most likely have a concern with the cars evap system, if the car is older than that then you most likely have a blockage in the vent for the gas filler pipe.
2016-05-27 16:19:43 · answer #7 · answered by ? 3 · 0⤊ 0⤋
Most gasoline tanks are buried in the ground, the ground temperature does not fluctuate to any degree on a daily cycle. As well the pumps are calibrated to take temperature into account.
2007-12-28 22:51:31 · answer #8 · answered by cimra 7 · 1⤊ 2⤋
Gasoline volume changes approximately 0.058% for every 1ºF.
If you fill up 13 gallons at 60ºF and latter it becomes 80ºF,
You will have equivalent of 13.16 gallons.
Canadian pumps have temperature compensators. When you fill up at 80ºF the pump will say 13.16 gallons the same pumping will show 13 gallons at 60ºF.
17 gallons at 60ºF is equivalent to 17.30 gallons at 90ºF.
2007-12-29 00:39:38 · answer #9 · answered by whyme 4 · 0⤊ 2⤋
Theoretically you gain from the cooler denser fuel, but if you fill to the brim and leave the vehicle to stand in the sun you will lose anything you have gained in expansion/evaporation.
So it may be worthwhile, but only if you drive off right after filling up.
2007-12-28 22:25:21 · answer #10 · answered by Ranjeeh D 5 · 1⤊ 2⤋