Not Logged In Log In   Sign Up   Points Leaders
Follow Us    11:05 PM

Message Forum - Read Message

Category: General Gas Talk > Topics Add to favorite topics   Post new topicPost New Topic
Author Topic: Do you pump slowly, in order to have less air in the gas? Back to Topics
FranklinON

All-Star Author
Ottawa

Posts:580
Points:574,640
Joined:Apr 2011
Message Posted: Jul 19, 2013 2:24:52 PM

I'm not sure if this is a myth - but I've been told that if you squeeze the pump so the fuel goes at top speed into your car, there's more air going into your tank, and you're paying for air. Conversely, if you have a light touch on the pump trigger, it takes twice as long to fill up but your gas is more 'gas', and less air, with the same overall volume & cost.

I've tried it - and so far all I can see is that I'm getting more volume into the car. Last night I put 42L into my car, which has a 40L tank, and the needle wasn't quite on E yet when I went to fill up.

I wish there were a search function on our forums, so I could find out if this has already been covered. I did check the most recent 5 pages. Does anyone know if pump speed affects the amount of air in your fuel?

REPLIES (newest first) Post a Reply
Profile Pic
PithyOpiner
Champion Author Stockton

Posts:18,255
Points:1,961,740
Joined:Jun 2008
Message Posted: Aug 18, 2014 2:30:59 PM

One time I pumped so slowly that I hardly had any air to breathe and nearly passed out right there at the gas station. I'll never pump so slowly again!!

[Edited by: PithyOpiner at 8/18/2014 2:31:39 PM EST]
Profile Pic
thomnrosie
Rookie Author San Jose

Posts:87
Points:40,090
Joined:Jul 2014
Message Posted: Aug 18, 2014 12:51:57 PM

Sometimes I do that but not really sure if it is true.
Profile Pic
inventorymaster
Champion Author KW

Posts:3,912
Points:1,007,965
Joined:Jul 2010
Message Posted: Aug 18, 2014 8:19:40 AM

no
Profile Pic
nichols
Champion Author Halifax

Posts:8,738
Points:2,280,515
Joined:Aug 2003
Message Posted: Aug 18, 2014 8:08:57 AM

only gas coming out the pump, any air is coming out of your gas tank
Profile Pic
kdanish
All-Star Author Santa Barbara

Posts:646
Points:179,030
Joined:Jan 2014
Message Posted: Aug 8, 2014 10:38:51 AM

No
Profile Pic
tkawashima
Champion Author Honolulu

Posts:6,017
Points:1,397,915
Joined:Sep 2010
Message Posted: Aug 8, 2014 10:24:57 AM

No
Profile Pic
pt88
Champion Author North Carolina

Posts:4,689
Points:1,191,975
Joined:Dec 2009
Message Posted: Aug 8, 2014 10:11:18 AM

no
Profile Pic
gvan
Champion Author Chicago

Posts:24,900
Points:3,333,490
Joined:Dec 2004
Message Posted: Aug 8, 2014 9:58:43 AM

No. Full power!
Profile Pic
DDubyu
Champion Author Ventura

Posts:22,098
Points:3,667,100
Joined:May 2004
Message Posted: Aug 8, 2014 5:03:18 AM

No
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Aug 8, 2014 4:42:30 AM

nope
Profile Pic
MertieMan
Champion Author Lexington

Posts:17,104
Points:3,394,385
Joined:May 2005
Message Posted: Aug 6, 2014 6:11:47 AM

No, it really doesn't matter how fast you pump, this is just another myth.
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Aug 6, 2014 12:51:23 AM

nope
Profile Pic
tkawashima
Champion Author Honolulu

Posts:6,017
Points:1,397,915
Joined:Sep 2010
Message Posted: Aug 4, 2014 10:55:19 AM

No
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Aug 4, 2014 9:41:35 AM

nope
Profile Pic
blogfrog81
Rookie Author Dayton

Posts:2
Points:48,915
Joined:Jun 2014
Message Posted: Aug 3, 2014 4:34:40 AM

I've been in petroleum distribution business for about 6 years, currently working for the Huang Oil Company here in Dayton, OH. I have researched all of the facts and have found some tricks to help you get your money's worth:

1. Fill up your auto in the morning when the temperature is still cool. Remember that all service stations have their storage tanks buried below ground; and the colder the ground, the denser the gasoline. When it gets warmer gasoline expands, so if you're filling up in the afternoon or in the evening, what should be a gallon is not exactly a gallon. In the petroleum business, the specific gravity and temperature of the fuel (gasoline, diesel, jet fuel, ethanol and other petroleum products) are significant. Every truckload that we load is temperature-compensated so that the indicated gallonage is actually the amount pumped. A one-degree rise in temperature is a big deal for businesses, but service stations don't have temperature compensation at their pumps.

2. If a tanker truck is filling the station's tank at the time you want to buy gas, do not fill up; most likely dirt and sludge in the tank is being stirred up when gas is being delivered, and you might be transferring that dirt from the bottom of their tank into your car's tank.

3. Fill up when your gas tank is half-full (or half-empty), because the more gas you have in your tank the less air there is and gasoline evaporates rapidly, especially when it's warm. (Gasoline storage tanks have an internal floating 'roof' membrane to act as a barrier between the gas and the atmosphere, thereby minimizing evaporation.)

4. If you look at the trigger you'll see that it has three delivery settings: slow, medium and high. When you're filling up do not squeeze the trigger of the nozzle to the high setting. You should be pumping at the slow setting, thereby minimizing vapors created while you are pumping. Hoses at the pump are corrugated; the corrugations act as a return path for vapor recovery from gas that already has been metered. If you are pumping at the high setting, the agitated gasoline contains more vapor, which is being sucked back into the underground tank so you're getting less gas for your money. Hope this will help ease your 'pain at the pump'

BlogFrog81
Profile Pic
DAWGnh
All-Star Author New Hampshire

Posts:861
Points:385,295
Joined:Mar 2011
Message Posted: Aug 3, 2014 2:01:34 AM

LOL no
Profile Pic
ScottAdams5
Champion Author New York

Posts:1,819
Points:583,835
Joined:Jan 2012
Message Posted: Aug 3, 2014 1:38:04 AM

Why do you ask?
Profile Pic
mybigtruck
Champion Author San Jose

Posts:1,077
Points:621,315
Joined:Oct 2009
Message Posted: Aug 3, 2014 1:19:48 AM

Why would there be air in the fuel being pumped in? I squirt it in at full rate.
Pumps suck from the bottom of the tank. Air is on top.
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Aug 3, 2014 1:12:58 AM

nope
Profile Pic
mawtaow
Champion Author Boston

Posts:1,642
Points:869,900
Joined:Mar 2011
Message Posted: Aug 2, 2014 6:01:26 AM

no
Profile Pic
hjl17
Champion Author Toronto

Posts:5,142
Points:1,102,920
Joined:Jul 2011
Message Posted: Aug 1, 2014 8:16:39 AM

No
Profile Pic
Seekingone
Champion Author Florida

Posts:5,733
Points:1,439,700
Joined:Aug 2006
Message Posted: Aug 1, 2014 8:00:02 AM

yes
Profile Pic
pvdray
Sophomore Author South Bend

Posts:116
Points:171,395
Joined:Dec 2013
Message Posted: Aug 1, 2014 7:34:09 AM

no
Profile Pic
mawtaow
Champion Author Boston

Posts:1,642
Points:869,900
Joined:Mar 2011
Message Posted: Aug 1, 2014 6:49:42 AM

no
Profile Pic
hockeybabe25
Veteran Author Allentown

Posts:339
Points:1,361,355
Joined:Aug 2006
Message Posted: Jul 31, 2014 12:36:25 AM

no
Profile Pic
BBF_PFS
Champion Author Washington

Posts:1,656
Points:519,620
Joined:Jan 2013
Message Posted: Jul 31, 2014 12:21:56 AM

Now this is funny.
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Jul 31, 2014 12:20:48 AM

nope
Profile Pic
dfp609
Champion Author Cincinnati

Posts:1,867
Points:576,055
Joined:Feb 2012
Message Posted: Jul 29, 2014 7:46:37 AM

No, should I?
Profile Pic
stonejd
Champion Author Illinois

Posts:1,819
Points:648,325
Joined:Feb 2012
Message Posted: Jul 29, 2014 7:36:00 AM

no
Profile Pic
hjl17
Champion Author Toronto

Posts:5,142
Points:1,102,920
Joined:Jul 2011
Message Posted: Jul 29, 2014 7:26:59 AM

No
Profile Pic
DDubyu
Champion Author Ventura

Posts:22,098
Points:3,667,100
Joined:May 2004
Message Posted: Jul 29, 2014 7:23:50 AM

No
Profile Pic
Seekingone
Champion Author Florida

Posts:5,733
Points:1,439,700
Joined:Aug 2006
Message Posted: Jul 29, 2014 7:05:45 AM

no
Profile Pic
wbacon
Champion Author Philadelphia

Posts:15,744
Points:3,479,750
Joined:Jun 2004
Message Posted: Jul 29, 2014 5:56:02 AM

no
Profile Pic
Thumper52
Champion Author New Brunswick

Posts:2,175
Points:874,250
Joined:May 2006
Message Posted: Jul 29, 2014 5:29:36 AM

No
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Jul 20, 2014 12:02:18 AM

nope
Profile Pic
sh1361
Sophomore Author Birmingham

Posts:147
Points:100,955
Joined:Jun 2012
Message Posted: Jul 18, 2014 7:28:54 PM

Did Big Foot share this information with you?
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Jul 18, 2014 12:14:23 AM

nope
Profile Pic
nickless
Champion Author PEI

Posts:16,184
Points:2,545,065
Joined:Aug 2007
Message Posted: Jul 15, 2014 1:42:55 AM

no
Profile Pic
DAWGnh
All-Star Author New Hampshire

Posts:861
Points:385,295
Joined:Mar 2011
Message Posted: Jul 15, 2014 12:24:44 AM

no
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Jul 15, 2014 12:20:59 AM

nope
Profile Pic
46chief
Champion Author Indiana

Posts:2,800
Points:2,287,050
Joined:May 2006
Message Posted: Jul 6, 2014 1:12:28 PM

Yes, sometimes. I don't know if it makes a difference or not.
Profile Pic
contiki
Champion Author Ontario

Posts:25,160
Points:1,005,065
Joined:Sep 2008
Message Posted: Jun 2, 2014 6:33:06 AM

Never...........
Profile Pic
John_Doe
Champion Author Northwest Territories

Posts:9,366
Points:1,470,450
Joined:Jul 2010
Message Posted: Jun 2, 2014 3:43:48 AM

no
Profile Pic
estroh
Champion Author Indiana

Posts:5,937
Points:1,229,600
Joined:May 2011
Message Posted: Jun 2, 2014 12:55:40 AM

nope
Profile Pic
contiki
Champion Author Ontario

Posts:25,160
Points:1,005,065
Joined:Sep 2008
Message Posted: May 30, 2014 6:33:39 AM

Never..........
Profile Pic
EvPv
Champion Author Maine

Posts:3,322
Points:762,735
Joined:Feb 2011
Message Posted: May 30, 2014 4:41:05 AM

no.
Profile Pic
ScottAdams5
Champion Author New York

Posts:1,819
Points:583,835
Joined:Jan 2012
Message Posted: May 30, 2014 4:16:35 AM

No.
Profile Pic
prkuehn
Champion Author Arkansas

Posts:5,290
Points:1,113,850
Joined:Aug 2011
Message Posted: May 30, 2014 3:04:03 AM

No
Profile Pic
cistech
Sophomore Author Massachusetts

Posts:121
Points:390,500
Joined:Apr 2012
Message Posted: May 29, 2014 11:24:17 PM

no.
Profile Pic
pt88
Champion Author North Carolina

Posts:4,689
Points:1,191,975
Joined:Dec 2009
Message Posted: May 29, 2014 6:26:49 PM

No
Post a reply Back to Topics